diff --git a/src/etc/inc/filter.inc b/src/etc/inc/filter.inc
index 6abd89314..1200b4e88 100644
--- a/src/etc/inc/filter.inc
+++ b/src/etc/inc/filter.inc
@@ -202,7 +202,9 @@ function filter_configure_sync($verbose = false, $load_aliases = true)
     ) {
         if (!empty($config['nat']['outbound']['rule'])) {
             foreach ($config['nat']['outbound']['rule'] as $rule) {
-                $fw->registerSNatRule(100, $rule);
+                if (is_array($rule)) {
+                    $fw->registerSNatRule(100, $rule);
+                }
             }
         }
     }
@@ -259,7 +261,9 @@ function filter_configure_sync($verbose = false, $load_aliases = true)
     if (!empty($config['nat']['rule'])) {
         // register user forward rules
         foreach ($config['nat']['rule'] as $rule) {
-            $fw->registerForwardRule(600, $rule);
+            if (is_array($rule)) {
+                $fw->registerForwardRule(600, $rule);
+            }
         }
     }
 
diff --git a/src/etc/inc/filter.lib.inc b/src/etc/inc/filter.lib.inc
index 3c5923202..f340d352b 100644
--- a/src/etc/inc/filter.lib.inc
+++ b/src/etc/inc/filter.lib.inc
@@ -614,6 +614,9 @@ function filter_core_rules_user($fw)
     if (isset($config['filter']['rule'])) {
         // register user rules
         foreach ($config['filter']['rule'] as $idx => $rule) {
+            if (!is_array($rule)) {
+                continue;
+            }
             // calculate a hash for this area so we can track this rule, we should replace this
             // with uuid's on the rules like the new style models do eventually.
             $rule['label'] = OPNsense\Firewall\Util::calcRuleHash($rule);