diff --git a/src/proto/if_cscope.pro b/src/proto/if_cscope.pro
index 3a3b392..f9919c4 100644
--- a/src/proto/if_cscope.pro
+++ b/src/proto/if_cscope.pro
@@ -1,9 +1,9 @@
 /* if_cscope.c */
 char_u *get_cscope_name(expand_T *xp, int idx);
 void set_context_in_cscope_cmd(expand_T *xp, char_u *arg, cmdidx_T cmdidx);
-void do_cscope(exarg_T *eap);
-void do_scscope(exarg_T *eap);
-void do_cstag(exarg_T *eap);
+void ex_cscope(exarg_T *eap);
+void ex_scscope(exarg_T *eap);
+void ex_cstag(exarg_T *eap);
 int cs_fgets(char_u *buf, int size);
 void cs_free_tags(void);
 void cs_print_tags(void);