diff --git a/src/proto/if_cscope.pro b/src/proto/if_cscope.pro
index aae9edf..0617d13 100644
--- a/src/proto/if_cscope.pro
+++ b/src/proto/if_cscope.pro
@@ -1,9 +1,9 @@
 /* if_cscope.c */
-extern void do_cscope __ARGS((exarg_T *eap));
-extern void do_scscope __ARGS((exarg_T *eap));
-extern void do_cstag __ARGS((exarg_T *eap));
-extern int cs_fgets __ARGS((char_u *buf, int size));
-extern void cs_free_tags __ARGS((void));
-extern void cs_print_tags __ARGS((void));
-extern int cs_connection __ARGS((int num, char_u *dbpath, char_u *ppath));
+void do_cscope __ARGS((exarg_T *eap));
+void do_scscope __ARGS((exarg_T *eap));
+void do_cstag __ARGS((exarg_T *eap));
+int cs_fgets __ARGS((char_u *buf, int size));
+void cs_free_tags __ARGS((void));
+void cs_print_tags __ARGS((void));
+int cs_connection __ARGS((int num, char_u *dbpath, char_u *ppath));
 /* vim: set ft=c : */