diff --git a/angularjs/angular-tests.ts b/angularjs/angular-tests.ts
index 975059999..fed501acd 100755
--- a/angularjs/angular-tests.ts
+++ b/angularjs/angular-tests.ts
@@ -281,6 +281,7 @@ function test_IAttributes(attributes: ng.IAttributes){
 }
 
 test_IAttributes({
+    $normalize: function (classVal){},
     $addClass: function (classVal){},
     $removeClass: function(classVal){},
     $set: function(key, value){},
diff --git a/angularjs/angular.d.ts b/angularjs/angular.d.ts
index c7c90efe5..158af1f6d 100755
--- a/angularjs/angular.d.ts
+++ b/angularjs/angular.d.ts
@@ -419,6 +419,15 @@ declare module angular {
          */
         [name: string]: any;
 
+        /**
+         * Converts an attribute name (e.g. dash/colon/underscore-delimited string, optionally prefixed with x- or data-) to its normalized, camelCase form.
+         * 
+         * Also there is special case for Moz prefix starting with upper case letter.
+         * 
+         * For further information check out the guide on @see https://docs.angularjs.org/guide/directive#matching-directives
+         */
+        $normalize(name: string): void;
+
         /**
          * Adds the CSS class value specified by the classVal parameter to the
          * element. If animations are enabled then an animation will be triggered