diff --git a/tools/quake2/qdata_heretic2/common/cmdlib.c b/tools/quake2/qdata_heretic2/common/cmdlib.c
index c42a10d2..6a49e950 100644
--- a/tools/quake2/qdata_heretic2/common/cmdlib.c
+++ b/tools/quake2/qdata_heretic2/common/cmdlib.c
@@ -84,15 +84,6 @@ void *SafeMalloc( size_t n, char *desc ){
 	return p;
 }
 
-#if defined( __linux__ ) || defined( __BSD__ ) || defined( __APPLE__ )
-void strlwr( char *conv_str ){
-	int i;
-
-	for ( i = 0; i < strlen( conv_str ); i++ )
-		conv_str[i] = tolower( conv_str[i] );
-}
-#endif
-
 
 // set these before calling CheckParm
 int myargc;
diff --git a/tools/quake2/qdata_heretic2/tmix.c b/tools/quake2/qdata_heretic2/tmix.c
index 58cc369f..8abbcc4a 100644
--- a/tools/quake2/qdata_heretic2/tmix.c
+++ b/tools/quake2/qdata_heretic2/tmix.c
@@ -24,6 +24,10 @@
 
 #define     MAXFILES    2048
 
+#if defined( __linux__ ) || defined( __BSD__ ) || defined( __APPLE__ )
+#define strlwr strlower
+#endif
+
 typedef struct
 {
 	int x;
diff --git a/tools/quake3/common/aselib.c b/tools/quake3/common/aselib.c
index 1d1c5915..b6360bfa 100644
--- a/tools/quake3/common/aselib.c
+++ b/tools/quake3/common/aselib.c
@@ -113,22 +113,6 @@ static char gl_filename[1024];
 static void ASE_Process( void );
 static void ASE_FreeGeomObject( int ndx );
 
-#if defined( __linux__ ) || defined( __BSD__ ) || defined( __APPLE__ )
-
-static char* strlwr( char* string ){
-	char *cp;
-	for ( cp = string; *cp; ++cp )
-	{
-		if ( 'A' <= *cp && *cp <= 'Z' ) {
-			*cp += 'a' - 'A';
-		}
-	}
-
-	return string;
-}
-
-#endif
-
 /*
 ** ASE_Load
 */