diff --git a/plugins/include/amxconst.inc b/plugins/include/amxconst.inc
index 3c0dbd6e..4672604f 100755
--- a/plugins/include/amxconst.inc
+++ b/plugins/include/amxconst.inc
@@ -322,3 +322,8 @@ enum {
 #define SND_CHANGE_VOL		(1<<6)		// change sound vol
 #define SND_CHANGE_PITCH	(1<<7)		// change sound pitch
 
+enum LibType
+{
+	LibType_Library,
+	LibType_Class
+};
diff --git a/plugins/include/amxmodx.inc b/plugins/include/amxmodx.inc
index 74c70372..6a150a4e 100755
--- a/plugins/include/amxmodx.inc
+++ b/plugins/include/amxmodx.inc
@@ -911,9 +911,9 @@ native set_native_filter(const handler[]);
  *
  * Your handler will be called with this prototype:
  *
- * public module_filter(const library[], bool:isClass);
+ * public module_filter(const library[], LibType:type);
  *  library - library or class name of the module that is required
- *  isClass - true if the name is a library class, false if it's a normal module
+ *  libtype - The type of requirement being checked (library/module or class).
  * 
  *
  * set_module_filter() returns 0 on success (unlike most natives).
@@ -939,6 +939,11 @@ native abort(error, const fmt[]="", {Float,_}:...);
  */
 native module_exists(const logtag[]);
 
+/**
+ * Checks if a library/class is loaded.  This is the newer version of module_exists.
+ */
+native LibraryExists(const library[], LibType:type);
+
 /**
  * Returns the next valid hudchannel for a user, from 1-4.
  */