diff --git a/src/proto/misc1.pro b/src/proto/misc1.pro
index 4b804c9..7d4c41f 100644
--- a/src/proto/misc1.pro
+++ b/src/proto/misc1.pro
@@ -47,5 +47,5 @@
 char_u *get_isolated_shell_name(void);
 int path_is_url(char_u *p);
 int path_with_url(char_u *fname);
-void trigger_modechanged();
+void trigger_modechanged(void);
 /* vim: set ft=c : */