diff --git a/src/ex_getln.c b/src/ex_getln.c
index 1512b03..a0c9877 100644
--- a/src/ex_getln.c
+++ b/src/ex_getln.c
@@ -626,8 +626,8 @@
 #endif
 		    if (vim_ispathsep(ccline.cmdbuff[j])
 #ifdef BACKSLASH_IN_FILENAME
-			    && vim_strchr(" *?[{`$%#", ccline.cmdbuff[j + 1])
-			       == NULL
+			    && vim_strchr((char_u *)" *?[{`$%#",
+				ccline.cmdbuff[j + 1]) == NULL
 #endif
 		       )
 		    {