diff --git a/src/proto/ex_cmds.pro b/src/proto/ex_cmds.pro
index a9e0658..9036dd2 100644
--- a/src/proto/ex_cmds.pro
+++ b/src/proto/ex_cmds.pro
@@ -27,7 +27,7 @@
 void ex_z(exarg_T *eap);
 int check_restricted(void);
 int check_secure(void);
-void do_sub(exarg_T *eap);
+void ex_substitute(exarg_T *eap);
 int do_sub_msg(int count_only);
 void ex_global(exarg_T *eap);
 void global_exe(char_u *cmd);