diff --git a/src/proto/if_cscope.pro b/src/proto/if_cscope.pro
index 06885b2..af2c076 100644
--- a/src/proto/if_cscope.pro
+++ b/src/proto/if_cscope.pro
@@ -1,6 +1,6 @@
 /* if_cscope.c */
 char_u *get_cscope_name __ARGS((expand_T *xp, int idx));
-void set_context_in_cscope_cmd __ARGS((expand_T *xp, char_u *arg));
+void set_context_in_cscope_cmd __ARGS((expand_T *xp, char_u *arg, cmdidx_T cmdidx));
 void do_cscope __ARGS((exarg_T *eap));
 void do_scscope __ARGS((exarg_T *eap));
 void do_cstag __ARGS((exarg_T *eap));