diff --git a/source/Ox.UI/js/Core/Ox.URL.js b/source/Ox.UI/js/Core/Ox.URL.js
index ff3b4591..06a6a37d 100644
--- a/source/Ox.UI/js/Core/Ox.URL.js
+++ b/source/Ox.UI/js/Core/Ox.URL.js
@@ -308,11 +308,16 @@ Ox.URL = function(options) {
                 return false;
             }
         });
-        if (Ox.getPositionById(self.options.findKeys, condition.key) == -1) {
-            condition = {key: '*', value: str, operator: '='};
-        } else if (!condition.operator) {
+        if (!condition.operator) {
+            // missing operator
             condition = {key: '*', value: condition.value, operator: '='};
-        }
+        } else if (
+            condition.key
+            && Ox.getPositionById(self.options.findKeys, condition.key) == -1
+        ) {
+            // unknown key
+            condition = {key: '*', value: str, operator: '='};
+        } 
         if (['=', '!='].indexOf(condition.operator) > -1) {
             if (condition.value[0] == '*') {
                 condition.value = condition.value.substr(1);