diff --git a/src/proto/ex_getln.pro b/src/proto/ex_getln.pro
index afbf664..2750542 100644
--- a/src/proto/ex_getln.pro
+++ b/src/proto/ex_getln.pro
@@ -4,6 +4,7 @@
 int text_locked __ARGS((void));
 void text_locked_msg __ARGS((void));
 int curbuf_locked __ARGS((void));
+int allbuf_locked __ARGS((void));
 char_u *getexline __ARGS((int c, void *dummy, int indent));
 char_u *getexmodeline __ARGS((int promptc, void *dummy, int indent));
 int cmdline_overstrike __ARGS((void));