diff --git a/bin/sh/alias.c b/bin/sh/alias.c
index da995bbd4733..044c869ed940 100644
--- a/bin/sh/alias.c
+++ b/bin/sh/alias.c
@@ -237,17 +237,19 @@ printaliases(void)
 }
 
 int
-aliascmd(int argc, char **argv)
+aliascmd(int argc __unused, char **argv __unused)
 {
 	char *n, *v;
 	int ret = 0;
 	struct alias *ap;
 
-	if (argc == 1) {
+	nextopt("");
+
+	if (*argptr == NULL) {
 		printaliases();
 		return (0);
 	}
-	while ((n = *++argv) != NULL) {
+	while ((n = *argptr++) != NULL) {
 		if ((v = strchr(n+1, '=')) == NULL) /* n+1: funny ksh stuff */
 			if ((ap = lookupalias(n, 0)) == NULL) {
 				warning("%s: not found", n);
diff --git a/tools/regression/bin/sh/builtins/alias4.0 b/tools/regression/bin/sh/builtins/alias4.0
new file mode 100644
index 000000000000..3d5efeccf2c7
--- /dev/null
+++ b/tools/regression/bin/sh/builtins/alias4.0
@@ -0,0 +1,4 @@
+# $FreeBSD$
+
+unalias -a
+alias --