diff --git a/metamod/src/conf_meta.cpp b/metamod/src/conf_meta.cpp
index 44bea7a..94c30c5 100644
--- a/metamod/src/conf_meta.cpp
+++ b/metamod/src/conf_meta.cpp
@@ -23,7 +23,7 @@ option_t *MConfig::find(const char* lookup) const
 		}
 	}
 	
-	return NULL;
+	return nullptr;
 }
 
 bool MConfig::set(const char* key, const char* value) const
@@ -97,18 +97,16 @@ bool MConfig::set(option_t* setp, const char* setstr)
 
 bool MConfig::load(const char* fn)
 {
-	FILE* fp;
 	char loadfile[PATH_MAX];
 	char line[MAX_CONF_LEN];
 	char *optname, *optval;
 	option_t* optp;
-	int ln;
 
 	// Make full pathname (from gamedir if relative, collapse "..",
 	// backslashes, etc).
 	full_gamedir_path(fn, loadfile);
 
-	fp = fopen(loadfile, "r");
+	FILE* fp = fopen(loadfile, "r");
 	if (!fp)
 	{
 		META_ERROR("unable to open config file '%s': %s", loadfile, strerror(errno));
@@ -116,7 +114,7 @@ bool MConfig::load(const char* fn)
 	}
 
 	META_DEBUG(2, "Loading from config file: %s", loadfile);
-	for (ln = 1; !feof(fp) && fgets(line, sizeof line, fp); ln++)
+	for (int ln = 1; !feof(fp) && fgets(line, sizeof line, fp); ln++)
 	{
 		if (line[0] == '#' || line[0] == ';' || !Q_strncmp(line, "//", 2))
 			continue;
@@ -127,7 +125,7 @@ bool MConfig::load(const char* fn)
 			continue;
 		}
 		
-		if (!(optval = strtok(NULL, "\r\n")))
+		if (!(optval = strtok(nullptr, "\r\n")))
 		{
 			META_ERROR("'%s' line %d: bad config format: missing value", loadfile, ln);
 			continue;
@@ -183,7 +181,7 @@ void MConfig::show() const
 void MConfig::set_directory()
 {
 #ifdef _WIN32
-	HMODULE hModule = NULL;
+	HMODULE hModule = nullptr;
 	GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, (LPCTSTR)GiveFnptrsToDll, &hModule);
 	GetModuleFileName(hModule, m_directory, sizeof m_directory);
 #else
diff --git a/metamod/src/conf_meta.h b/metamod/src/conf_meta.h
index 6540fcb..17047e3 100644
--- a/metamod/src/conf_meta.h
+++ b/metamod/src/conf_meta.h
@@ -45,10 +45,6 @@ private:
 
 	option_t *find(const char *lookup) const;
 	static bool set(option_t *setp, const char *value);
-	// Private; to satisfy -Weffc++ "has pointer data members but does
-	// not override" copy/assignment constructor.
-	void operator=(const MConfig &src);
-	MConfig(const MConfig &src);
 };
 
 inline const char *MConfig::directory() const
diff --git a/metamod/src/game_support.cpp b/metamod/src/game_support.cpp
index 513034a..6ab1568 100644
--- a/metamod/src/game_support.cpp
+++ b/metamod/src/game_support.cpp
@@ -14,7 +14,7 @@ const game_modinfo_t g_known_games[] = {
 	{ "czero",	"cs.so",		"mp.dll",		"Counter-Strike:Condition Zero" },
 
 	// End of list terminator:
-	{ NULL, NULL, NULL, NULL }
+	{ nullptr, nullptr, nullptr, nullptr }
 };
 
 // Find a modinfo corresponding to the given game name.
diff --git a/metamod/src/jitasm.h b/metamod/src/jitasm.h
index 1961c6a..6562d91 100644
--- a/metamod/src/jitasm.h
+++ b/metamod/src/jitasm.h
@@ -884,7 +884,7 @@ struct Backend
 	size_t	buffsize_;
 	size_t	size_;
 
-	Backend(void* pbuff = NULL, size_t buffsize = 0) : pbuff_((uint8*) pbuff), buffsize_(buffsize), size_(0)
+	Backend(void* pbuff = nullptr, size_t buffsize = 0) : pbuff_((uint8*) pbuff), buffsize_(buffsize), size_(0)
 	{
 		memset(pbuff, 0xCC, buffsize);	// INT3
 	}
@@ -1323,7 +1323,7 @@ namespace detail
 		size_t	buffsize_;
 
 	public:
-		CodeBuffer() : pbuff_(NULL), codesize_(0), buffsize_(0) {}
+		CodeBuffer() : pbuff_(nullptr), codesize_(0), buffsize_(0) {}
 		~CodeBuffer() {Reset(0);}
 
 		void* GetPointer() const {return pbuff_;}
@@ -1338,13 +1338,13 @@ namespace detail
 #else
 				munmap(pbuff_, buffsize_);
 #endif
-				pbuff_ = NULL;
+				pbuff_ = nullptr;
 				codesize_ = 0;
 				buffsize_ = 0;
 			}
 			if (codesize) {
 #if defined(JITASM_WIN)
-				void* pbuff = ::VirtualAlloc(NULL, codesize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
+				void* pbuff = ::VirtualAlloc(nullptr, codesize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
 				if (!pbuff) {
 					JITASM_ASSERT(0);
 					return false;
@@ -1355,7 +1355,7 @@ namespace detail
 #else
 				int pagesize = getpagesize();
 				size_t buffsize = (codesize + pagesize - 1) / pagesize * pagesize;
-				void* pbuff = mmap(NULL, buffsize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANON, -1, 0);
+				void* pbuff = mmap(nullptr, buffsize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANON, -1, 0);
 				if (!pbuff) {
 					JITASM_ASSERT(0);
 					return false;
@@ -5584,7 +5584,7 @@ namespace compiler
 			}
 
 			// build interval
-			BitVector *last_liveness = NULL;
+			BitVector *last_liveness = nullptr;
 			std::vector<uint32> reg_assignables;
 			bool last_reg_constraints = false;
 			bool last_stack_vars = false;
@@ -5648,7 +5648,7 @@ namespace compiler
 			for (size_t v = 0; v < use_points.size(); ++v) {
 				RegUsePointRange range(use_points[v]);
 				for (size_t i = 0; i < intervals.size(); ++i) {
-					const Interval *next_interval  = i + 1 < intervals.size() ? &intervals[i + 1] : NULL;
+					const Interval *next_interval  = i + 1 < intervals.size() ? &intervals[i + 1] : nullptr;
 					intervals[i].UpdateUse(v, range, next_interval);
 				}
 			}
@@ -5664,7 +5664,7 @@ namespace compiler
 			for (size_t v = 0; v < use_points.size(); ++v) {
 				RegUsePointRange range(use_points[v]);
 				for (size_t i = interval_idx; i < interval_idx + 2; ++i) {
-					const Interval *next_interval  = i + 1 < intervals.size() ? &intervals[i + 1] : NULL;
+					const Interval *next_interval  = i + 1 < intervals.size() ? &intervals[i + 1] : nullptr;
 					intervals[i].UpdateUse(v, range, next_interval);
 				}
 			}
@@ -5921,7 +5921,7 @@ namespace compiler
 		size_t loop_depth;					///< Loop nesting depth
 		Lifetime lifetime[3];				///< Variable lifetime (0: GP, 1: MMX, 2: XMM/YMM)
 
-		BasicBlock(size_t instr_begin_, size_t instr_end_, BasicBlock *successor0 = NULL, BasicBlock *successor1 = NULL) : instr_begin(instr_begin_), instr_end(instr_end_), depth((size_t)-1), dfs_parent(NULL), immediate_dominator(NULL), loop_depth(0) {
+		BasicBlock(size_t instr_begin_, size_t instr_end_, BasicBlock *successor0 = nullptr, BasicBlock *successor1 = nullptr) : instr_begin(instr_begin_), instr_end(instr_end_), depth((size_t)-1), dfs_parent(nullptr), immediate_dominator(nullptr), loop_depth(0) {
 			successor[0] = successor0;
 			successor[1] = successor1;
 		}
@@ -6054,7 +6054,7 @@ namespace compiler
 					dom[w] = dom[dom[w]];
 				depth_first_blocks[w]->immediate_dominator = depth_first_blocks[dom[w]];
 			}
-			depth_first_blocks[0]->immediate_dominator = NULL;
+			depth_first_blocks[0]->immediate_dominator = nullptr;
 		}
 	};
 
@@ -6156,7 +6156,7 @@ namespace compiler
 			new_block->successor[1] = target_block->successor[1];
 			new_block->predecessor.push_back(target_block);
 			target_block->successor[0] = new_block;
-			target_block->successor[1] = NULL;
+			target_block->successor[1] = nullptr;
 			target_block->instr_end = instr_idx;
 
 			// replace predecessor of successors
@@ -6584,14 +6584,14 @@ namespace compiler
 		}
 
 		uint32 used_reg = 0;
-		const Lifetime::Interval *last_interval = NULL;
+		const Lifetime::Interval *last_interval = nullptr;
 		size_t last_loop_depth = 0;
 		for (ControlFlowGraph::BlockList::iterator block = cfg.dfs_begin(); block != cfg.dfs_end(); ++block) {
 			Lifetime& lifetime = (*block)->lifetime[reg_family];
 			const size_t loop_depth = (*block)->loop_depth;
 
 			// Spill identification
-			lifetime.SpillIdentification(available_reg_count, total_spill_cost, (*block)->GetFrequency(), last_loop_depth == loop_depth ? last_interval : NULL, var_attrs);
+			lifetime.SpillIdentification(available_reg_count, total_spill_cost, (*block)->GetFrequency(), last_loop_depth == loop_depth ? last_interval : nullptr, var_attrs);
 
 			// Register assignment
 			used_reg |= lifetime.AssignRegister(available_reg, last_interval);
diff --git a/metamod/src/metamod.cpp b/metamod/src/metamod.cpp
index bc3cbb9..d71be2f 100644
--- a/metamod/src/metamod.cpp
+++ b/metamod/src/metamod.cpp
@@ -150,7 +150,6 @@ void metamod_startup()
 	// until later.
 	if (g_config->m_debuglevel != 0)
 		CVAR_SET_FLOAT("meta_debug", g_config->m_debuglevel);
-
 	if (!g_config->m_clientmeta)
 		disable_clientcommand_fwd();
 
diff --git a/metamod/src/mlist.cpp b/metamod/src/mlist.cpp
index 5f103c5..764839b 100644
--- a/metamod/src/mlist.cpp
+++ b/metamod/src/mlist.cpp
@@ -243,7 +243,7 @@ MPlugin* MPluginList::add(MPlugin* padd)
 	if (!iplug)
 	{
 		META_ERROR("Couldn't add plugin '%s' to list; reached max plugins (%d)", padd->m_file, MAX_PLUGINS);
-		return NULL;
+		return nullptr;
 	}
 
 	// copy filename into this free slot
@@ -321,7 +321,7 @@ bool MPluginList::ini_startup()
 
 		// Check for a matching platform with different platform specifics
 		// level.
-		if (NULL != (pmatch = find_match(&m_plist[n])))
+		if (nullptr != (pmatch = find_match(&m_plist[n])))
 		{
 			if (pmatch->m_pfspecific >= m_plist[n].m_pfspecific)
 			{
@@ -390,7 +390,7 @@ bool MPluginList::ini_refresh()
 		{
 			// Check for a matching platform with higher platform specifics
 			// level.
-			if (NULL != (pl_found = find_match(&pl_temp)))
+			if (nullptr != (pl_found = find_match(&pl_temp)))
 			{
 				if (pl_found->m_pfspecific >= pl_temp.m_pfspecific)
 				{
diff --git a/metamod/src/osdep.cpp b/metamod/src/osdep.cpp
index 1cb5d05..e501070 100644
--- a/metamod/src/osdep.cpp
+++ b/metamod/src/osdep.cpp
@@ -133,7 +133,7 @@ const char* CSysModule::getloaderror()
 const char *str_GetLastError()
 {
 	static char buf[MAX_STRBUF_LEN];
-	FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&buf, MAX_STRBUF_LEN - 1, NULL);
+	FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, nullptr, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&buf, MAX_STRBUF_LEN - 1, nullptr);
 	return buf;
 }
 #endif
diff --git a/metamod/src/sdk_util.cpp b/metamod/src/sdk_util.cpp
index d3325a9..4fa9c7c 100644
--- a/metamod/src/sdk_util.cpp
+++ b/metamod/src/sdk_util.cpp
@@ -45,7 +45,7 @@ void UTIL_HudMessage(edict_t *pEntity, const hudtextparms_t &textparms, const ch
 	if (FNullEnt(pEntity) || pEntity->free)
 		return;
 
-	MESSAGE_BEGIN(MSG_ONE, SVC_TEMPENTITY, NULL, pEntity);
+	MESSAGE_BEGIN(MSG_ONE, SVC_TEMPENTITY, nullptr, pEntity);
 	WRITE_BYTE(TE_TEXTMESSAGE);
 	WRITE_BYTE(textparms.channel & 0xFF);
 
diff --git a/metamod/src/utils.cpp b/metamod/src/utils.cpp
index a91ca60..285bb77 100644
--- a/metamod/src/utils.cpp
+++ b/metamod/src/utils.cpp
@@ -17,7 +17,7 @@ char* ENTITY_KEYVALUE(edict_t* entity, char* key)
 
 const char* LOCALINFO(char* key)
 {
-	return ENTITY_KEYVALUE(NULL, key);
+	return ENTITY_KEYVALUE(nullptr, key);
 }
 
 static_allocator::static_allocator(memory_protection protection) : m_protection(protection)
@@ -61,9 +61,9 @@ size_t static_allocator::memory_used() const
 void static_allocator::allocate_page()
 {
 #ifdef WIN32
-	auto page = VirtualAlloc(NULL, Pagesize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
+	auto page = VirtualAlloc(nullptr, Pagesize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
 #else
-	auto page = mmap(NULL, Pagesize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
+	auto page = mmap(nullptr, Pagesize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
 #endif
 
 	m_used = 0;
@@ -103,7 +103,7 @@ char *trimbuf(char *str)
 {
 	char *ibuf;
 
-	if (str == NULL) return NULL;
+	if (str == nullptr) return nullptr;
 	for (ibuf = str; *ibuf && (byte)(*ibuf) < (byte)0x80 && isspace(*ibuf); ++ibuf)
 		;
 
@@ -147,20 +147,19 @@ bool IsAbsolutePath(const char *path)
 #ifdef _WIN32
 char *realpath(const char *file_name, char *resolved_name)
 {
-	int ret = GetFullPathName(file_name, PATH_MAX, resolved_name, NULL);
+	int ret = GetFullPathName(file_name, PATH_MAX, resolved_name, nullptr);
 	
 	if (ret > PATH_MAX) {
 		errno = ENAMETOOLONG;
-		return NULL;
+		return nullptr;
 	}
 	
 	if (ret > 0) {
-		HANDLE handle;
 		WIN32_FIND_DATA find_data;
-		handle = FindFirstFile(resolved_name, &find_data);
+		HANDLE handle = FindFirstFile(resolved_name, &find_data);
 		if (INVALID_HANDLE_VALUE == handle) {
 			errno = ENOENT;
-			return NULL;
+			return nullptr;
 		}
 
 		FindClose(handle);
@@ -168,6 +167,6 @@ char *realpath(const char *file_name, char *resolved_name)
 		return resolved_name;
 	}
 
-	return NULL;
+	return nullptr;
 }
 #endif // _WIN32