diff --git a/src/etc/rc.newwanip b/src/etc/rc.newwanip
index 4831043f2d..d7afb2a85f 100755
--- a/src/etc/rc.newwanip
+++ b/src/etc/rc.newwanip
@@ -106,6 +106,7 @@ if (empty($interface)) {
 	if (platform_booting()) {
 		return;
 	}
+	log_error("rc.newwanip called with empty interface.");
 	filter_configure();
 	restart_packages();
 	return;
diff --git a/src/etc/rc.newwanipv6 b/src/etc/rc.newwanipv6
index bd46bdf4ed..1187f1332d 100755
--- a/src/etc/rc.newwanipv6
+++ b/src/etc/rc.newwanipv6
@@ -74,6 +74,7 @@ if (empty($argument)) {
 $interface_descr = convert_friendly_interface_to_friendly_descr($interface);
 
 if (empty($interface)) {
+	log_error("rc.newwanipv6 called with empty interface");
 	filter_configure();
 	return;
 }