diff --git a/include/QF/quakefs.h b/include/QF/quakefs.h
index f80e32bfb..a84ab97ab 100644
--- a/include/QF/quakefs.h
+++ b/include/QF/quakefs.h
@@ -344,7 +344,7 @@ const char *QFS_FileExtension (const char *in);
 	\param func		The function to call every time the gamedir changes via
 					QFS_Gamedir().
 */
-void QFS_GamedirCallback (gamedir_callback_t *);
+void QFS_GamedirCallback (gamedir_callback_t *func);
 
 /**	Create a new file list.