diff --git a/sys/net/if.c b/sys/net/if.c
--- a/sys/net/if.c
+++ b/sys/net/if.c
@@ -4685,6 +4685,13 @@
 	return (count);
 }
 
+bool
+if_maddr_empty(if_t ifp)
+{
+
+	return (CK_STAILQ_EMPTY(&ifp->if_multiaddrs));
+}
+
 u_int
 if_foreach_llmaddr(if_t ifp, iflladdr_cb_t cb, void *cb_arg)
 {
diff --git a/sys/net/if_var.h b/sys/net/if_var.h
--- a/sys/net/if_var.h
+++ b/sys/net/if_var.h
@@ -657,6 +657,7 @@
 u_int if_foreach_llmaddr(if_t, iflladdr_cb_t, void *);
 u_int if_lladdr_count(if_t);
 u_int if_llmaddr_count(if_t);
+bool if_maddr_empty(if_t);
 
 int if_getamcount(const if_t ifp);
 struct ifaddr * if_getifaddr(const if_t ifp);