diff --git a/src/proto/misc2.pro b/src/proto/misc2.pro
index 397a09a..c386a0d 100644
--- a/src/proto/misc2.pro
+++ b/src/proto/misc2.pro
@@ -29,6 +29,7 @@
 char_u *vim_strnsave __ARGS((char_u *string, int len));
 char_u *vim_strsave_escaped __ARGS((char_u *string, char_u *esc_chars));
 char_u *vim_strsave_escaped_ext __ARGS((char_u *string, char_u *esc_chars, int cc, int bsl));
+int csh_like_shell __ARGS((void));
 char_u *vim_strsave_shellescape __ARGS((char_u *string, int do_special));
 char_u *vim_strsave_up __ARGS((char_u *string));
 char_u *vim_strnsave_up __ARGS((char_u *string, int len));