diff --git a/src/ops.c b/src/ops.c
index 2e428ae..128984e 100644
--- a/src/ops.c
+++ b/src/ops.c
@@ -1129,7 +1129,7 @@
 	new_last_cmdline = NULL;
 	/* Escape all control characters with a CTRL-V */
 	p = vim_strsave_escaped_ext(last_cmdline,
-		"\001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037", Ctrl_V, FALSE);
+		(char_u *)"\001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037", Ctrl_V, FALSE);
 	if (p != NULL)
 	    retval = put_in_typebuf(p, TRUE);
 	vim_free(p);