diff --git a/src/proto/ex_docmd.pro b/src/proto/ex_docmd.pro
index 899c68e..22a0f10 100644
--- a/src/proto/ex_docmd.pro
+++ b/src/proto/ex_docmd.pro
@@ -39,6 +39,7 @@
 void tabpage_new __ARGS((void));
 void do_exedit __ARGS((exarg_T *eap, win_T *old_curwin));
 void free_cd_dir __ARGS((void));
+void ex_cd __ARGS((exarg_T *eap));
 void do_sleep __ARGS((long msec));
 int vim_mkdir_emsg __ARGS((char_u *name, int prot));
 FILE *open_exfile __ARGS((char_u *fname, int forceit, char *mode));