diff --git a/src/proto/screen.pro b/src/proto/screen.pro
index f8b14c4..5bc3fba 100644
--- a/src/proto/screen.pro
+++ b/src/proto/screen.pro
@@ -23,7 +23,7 @@
 void win_redr_status_matches(expand_T *xp, int num_matches, char_u **matches, int match, int showtail);
 void win_redr_status(win_T *wp);
 int stl_connected(win_T *wp);
-int get_keymap_str(win_T *wp, char_u *buf, int len);
+int get_keymap_str(win_T *wp, char_u *fmt, char_u *buf, int len);
 void screen_putchar(int c, int row, int col, int attr);
 void screen_getbytes(int row, int col, char_u *bytes, int *attrp);
 void screen_puts(char_u *text, int row, int col, int attr);