diff --git a/rehlds/engine/cmd.cpp b/rehlds/engine/cmd.cpp
index 38eaa08..1a8680e 100644
--- a/rehlds/engine/cmd.cpp
+++ b/rehlds/engine/cmd.cpp
@@ -57,7 +57,7 @@ void Cbuf_Init(void)
 
 // As new commands are generated from the console or keybindings,
 // the text is added to the end of the command buffer.
-void Cbuf_AddText(char *text)
+void Cbuf_AddText(const char *text)
 {
 	int len = Q_strlen(text);
 
@@ -73,7 +73,7 @@ void Cbuf_AddText(char *text)
 // When a command wants to issue other commands immediately, the text is
 // inserted at the beginning of the buffer, before any remaining unexecuted
 // commands.
-void Cbuf_InsertText(char *text)
+void Cbuf_InsertText(const char *text)
 {
 
 	int addLen = Q_strlen(text);
@@ -112,7 +112,7 @@ void Cbuf_InsertText(char *text)
 #endif // REHLDS_FIXES
 }
 
-void Cbuf_InsertTextLines(char *text)
+void Cbuf_InsertTextLines(const char *text)
 {
 	int addLen = Q_strlen(text);
 	int currLen = cmd_text.cursize;
@@ -862,7 +862,7 @@ qboolean Cmd_Exists(const char *cmd_name)
 	return FALSE;
 }
 
-NOXREF const char *Cmd_CompleteCommand(char *search, int forward)
+NOXREF const char *Cmd_CompleteCommand(const char *search, int forward)
 {
 	NOXREFCHECK;
 
@@ -1057,7 +1057,7 @@ qboolean Cmd_ForwardToServerUnreliable(void)
 
 // Returns the position (1 to argc-1) in the command's argument list
 // where the given parameter apears, or 0 if not present.
-NOXREF int Cmd_CheckParm(char *parm)
+NOXREF int Cmd_CheckParm(const char *parm)
 {
 	NOXREFCHECK;
 
diff --git a/rehlds/engine/cmd.h b/rehlds/engine/cmd.h
index ececf8f..c685544 100644
--- a/rehlds/engine/cmd.h
+++ b/rehlds/engine/cmd.h
@@ -86,9 +86,9 @@ extern cmdalias_t *cmd_alias;
 
 void Cmd_Wait_f(void);
 void Cbuf_Init(void);
-void Cbuf_AddText(char *text);
-void Cbuf_InsertText(char *text);
-void Cbuf_InsertTextLines(char *text);
+void Cbuf_AddText(const char *text);
+void Cbuf_InsertText(const char *text);
+void Cbuf_InsertTextLines(const char *text);
 void Cbuf_Execute(void);
 void Cmd_StuffCmds_f(void);
 void Cmd_Exec_f(void);
@@ -115,10 +115,10 @@ NOXREF void Cmd_RemoveHudCmds(void);
 void Cmd_RemoveGameCmds(void);
 void Cmd_RemoveWrapperCmds(void);
 qboolean Cmd_Exists(const char *cmd_name);
-NOXREF const char *Cmd_CompleteCommand(char *search, int forward);
+NOXREF const char *Cmd_CompleteCommand(const char *search, int forward);
 void Cmd_ExecuteString(char *text, cmd_source_t src);
 qboolean Cmd_ForwardToServerInternal(sizebuf_t *pBuf);
 void Cmd_ForwardToServer(void);
 qboolean Cmd_ForwardToServerUnreliable(void);
-NOXREF int Cmd_CheckParm(char *parm);
+NOXREF int Cmd_CheckParm(const char *parm);
 void Cmd_CmdList_f(void);