diff --git a/src/proto/getchar.pro b/src/proto/getchar.pro
index 57d78b5..bf131a5 100644
--- a/src/proto/getchar.pro
+++ b/src/proto/getchar.pro
@@ -37,7 +37,7 @@
 void close_all_scripts(void);
 int using_script(void);
 void before_blocking(void);
-int merge_modifyOtherKeys(int c_arg);
+int merge_modifyOtherKeys(int c_arg, int *modifiers);
 int vgetc(void);
 int safe_vgetc(void);
 int plain_vgetc(void);