diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index fbb0f5a..20c58f1 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -4146,7 +4146,7 @@
 
 	/* For a shell command a '!' must be escaped. */
 	if ((eap->usefilter || eap->cmdidx == CMD_bang)
-					&& vim_strpbrk(repl, "!&;()") != NULL)
+			      && vim_strpbrk(repl, (char_u *)"!&;()") != NULL)
 	{
 	    char_u	*l;