diff --git a/contrib/gtkgensurf/gensurf.cpp b/contrib/gtkgensurf/gensurf.cpp
index bc31f858..17160aa9 100644
--- a/contrib/gtkgensurf/gensurf.cpp
+++ b/contrib/gtkgensurf/gensurf.cpp
@@ -117,7 +117,7 @@ bool GenSurfInit(){
     basepath = g_FuncTable.m_pfnReadProjectKey("basepath");
     if (basepath)
     {
-      Q_strlwr (basepath);
+      strlwr (basepath);
       if (strstr(basepath,"baseq3"))
         Game = QUAKE3;
       else if (strstr (basepath,"baseq2"))
diff --git a/contrib/gtkgensurf/heretic.cpp b/contrib/gtkgensurf/heretic.cpp
index 00765538..7f24179a 100644
--- a/contrib/gtkgensurf/heretic.cpp
+++ b/contrib/gtkgensurf/heretic.cpp
@@ -75,7 +75,7 @@ int GetDefSurfaceProps( char *Tex ){
 	      if (NULL != (fpak = fopen(pakfile[Game], "rb")))
 	      {
 	          sprintf(path,"textures/%s.m8",Tex);
-	          Q_strlwr(path);
+	          strlwr(path);
 	          num=fread(&pakheader,1,sizeof(pak_header_t),fpak);
 	          if((size_t)num < sizeof(pak_header_t))
 	          {
@@ -116,7 +116,7 @@ int GetDefSurfaceProps( char *Tex ){
 	      // Assume .map will be output to gamedir/maps, then back up
 	      // to the gamedir and append /textures. Ugly but it should work
 	      strcpy(path,gszMapFile);
-	      Q_strlwr(path);
+	      strlwr(path);
 	      p = strstr(path,"maps");
 	      if(!p) return 0;
 	      p[0] = '\0';