diff --git a/src/proto/misc2.pro b/src/proto/misc2.pro
index 5cbd270..41479d0 100644
--- a/src/proto/misc2.pro
+++ b/src/proto/misc2.pro
@@ -52,6 +52,7 @@
 void ga_append __ARGS((garray_T *gap, int c));
 int name_to_mod_mask __ARGS((int c));
 int simplify_key __ARGS((int key, int *modifiers));
+int handle_x_keys __ARGS((int key));
 char_u *get_special_key_name __ARGS((int c, int modifiers));
 int trans_special __ARGS((char_u **srcp, char_u *dst, int keycode));
 int find_special_key __ARGS((char_u **srcp, int *modp, int keycode));