1 files changed, 1 insertions, 1 deletions

diff --git a/src/keymap.h b/src/keymap.h
index 185ae70d945..df135114c87 100644
--- a/src/keymap.h
+++ b/src/keymap.h
@@ -47,7 +47,7 @@ extern void syms_of_keymap P_ ((void));
 extern void keys_of_keymap P_ ((void));
 
 typedef void (*map_keymap_function_t)
-     P_ ((Lisp_Object, Lisp_Object, Lisp_Object, void*));
+     P_ ((Lisp_Object key, Lisp_Object val, Lisp_Object args, void* data));
 extern void map_keymap P_ ((Lisp_Object map, map_keymap_function_t fun, Lisp_Object largs, void* cargs, int autoload));
 
 #endif