diff --git a/rules/definedundefined.js b/rules/definedundefined.js
index e747a9ed..8005cf27 100644
--- a/rules/definedundefined.js
+++ b/rules/definedundefined.js
@@ -9,7 +9,17 @@
  */
 'use strict';
 
+var utils = require('./utils/utils');
+
+
 module.exports = function(context) {
+    function isCompareOperator(operator) {
+        return operator === '===' || operator === '!==' || operator === '==' || operator === '!=';
+    }
+    function reportError(node) {
+        context.report(node, 'You should not use directly the "undefined" keyword. Prefer ' +
+            'angular.isUndefined or angular.isDefined', {});
+    }
     /**
     *    Rule that check if we use angular.is(Un)defined() instead of the undefined keyword
     */
@@ -27,15 +37,15 @@ module.exports = function(context) {
             }
         },
         BinaryExpression: function(node) {
-            if (node.operator === '===' || node.operator === '!==') {
-                if (node.left.type === 'Identifier' && node.left.name === 'undefined') {
-                    context.report(node, 'You should not use directly the "undefined" keyword. Prefer ' +
-                        'angular.isUndefined or angular.isDefined', {});
-                }
-
-                if (node.right.type === 'Identifier' && node.right.name === 'undefined') {
-                    context.report(node, 'You should not use directly the "undefined" keyword. Prefer ' +
-                        'angular.isUndefined or angular.isDefined', {});
+            if (isCompareOperator(node.operator)) {
+                if (utils.isTypeOfStatement(node.left) && node.right.value === 'undefined') {
+                    reportError(node);
+                } else if (utils.isTypeOfStatement(node.right) && node.left.value === 'undefined') {
+                    reportError(node);
+                } else if (node.left.type === 'Identifier' && node.left.name === 'undefined') {
+                    reportError(node);
+                } else if (node.right.type === 'Identifier' && node.right.name === 'undefined') {
+                    reportError(node);
                 }
             }
         }
diff --git a/test/definedundefined.js b/test/definedundefined.js
index 4a6710fd..f3e1cc4a 100644
--- a/test/definedundefined.js
+++ b/test/definedundefined.js
@@ -16,13 +16,26 @@ var eslintTester = new RuleTester();
 eslintTester.run('definedundefined', rule, {
     valid: [
         'angular.isUndefined(toto)',
-        'angular.isDefined(toto)'
+        'angular.isDefined(toto)',
+        // possible false positives
+        'variable === otherValue',
+        'variable === null',
+        'variable > undefined',
+        'angular.isString(null)'
     ].concat(commonFalsePositives),
     invalid: [
         {code: 'variable === undefined', errors: [{message: 'You should not use directly the "undefined" keyword. Prefer angular.isUndefined or angular.isDefined'}]},
         {code: 'undefined === variable', errors: [{message: 'You should not use directly the "undefined" keyword. Prefer angular.isUndefined or angular.isDefined'}]},
         {code: 'undefined !== variable', errors: [{message: 'You should not use directly the "undefined" keyword. Prefer angular.isUndefined or angular.isDefined'}]},
         {code: 'variable !== undefined', errors: [{message: 'You should not use directly the "undefined" keyword. Prefer angular.isUndefined or angular.isDefined'}]},
+        {code: 'variable == undefined', errors: [{message: 'You should not use directly the "undefined" keyword. Prefer angular.isUndefined or angular.isDefined'}]},
+        {code: 'undefined == variable', errors: [{message: 'You should not use directly the "undefined" keyword. Prefer angular.isUndefined or angular.isDefined'}]},
+        {code: 'undefined != variable', errors: [{message: 'You should not use directly the "undefined" keyword. Prefer angular.isUndefined or angular.isDefined'}]},
+        {code: 'variable != undefined', errors: [{message: 'You should not use directly the "undefined" keyword. Prefer angular.isUndefined or angular.isDefined'}]},
+        {code: 'typeof variable === "undefined"', errors: [{message: 'You should not use directly the "undefined" keyword. Prefer angular.isUndefined or angular.isDefined'}]},
+        {code: 'typeof variable !== "undefined"', errors: [{message: 'You should not use directly the "undefined" keyword. Prefer angular.isUndefined or angular.isDefined'}]},
+        {code: '"undefined" == typeof variable', errors: [{message: 'You should not use directly the "undefined" keyword. Prefer angular.isUndefined or angular.isDefined'}]},
+        {code: '"undefined" != typeof variable', errors: [{message: 'You should not use directly the "undefined" keyword. Prefer angular.isUndefined or angular.isDefined'}]},
         {code: '!angular.isUndefined(variable)', errors: [{message: 'Instead of !angular.isUndefined, you can use the out-of-box angular.isDefined method'}]},
         {code: '!angular.isDefined(variable)', errors: [{message: 'Instead of !angular.isDefined, you can use the out-of-box angular.isUndefined method'}]}
     ]