diff --git a/src/proto/quickfix.pro b/src/proto/quickfix.pro
index 65ef438..a5c690f 100644
--- a/src/proto/quickfix.pro
+++ b/src/proto/quickfix.pro
@@ -23,7 +23,7 @@
 void ex_vimgrep __ARGS((exarg_T *eap));
 char_u *skip_vimgrep_pat __ARGS((char_u *p, char_u **s, int *flags));
 int get_errorlist __ARGS((win_T *wp, list_T *list));
-int set_errorlist __ARGS((win_T *wp, list_T *list, int action));
+int set_errorlist __ARGS((win_T *wp, list_T *list, int action, char_u *title));
 void ex_cbuffer __ARGS((exarg_T *eap));
 void ex_cexpr __ARGS((exarg_T *eap));
 void ex_helpgrep __ARGS((exarg_T *eap));