diff --git a/src/ol/expr/expression.js b/src/ol/expr/expression.js
index d90eca6b0d..18508f29cf 100644
--- a/src/ol/expr/expression.js
+++ b/src/ol/expr/expression.js
@@ -191,32 +191,30 @@ ol.expr.lib[ol.expr.functions.LIKE] = function(value, pattern, wildCard,
 
 /**
  * Case insensitive comparison for equality.
- * @param {string} attribute Name of the attribute.
- * @param {string} value Value to test for equality.
+ * @param {*} first First value.
+ * @param {*} second Second value.
  * @this {ol.Feature}
  */
-ol.expr.lib[ol.expr.functions.IEQ] = function(attribute, value) {
-  var attributeValue = this.get(attribute);
-  if (goog.isString(value) && goog.isString(attributeValue)) {
-    return value.toUpperCase() == attributeValue.toUpperCase();
+ol.expr.lib[ol.expr.functions.IEQ] = function(first, second) {
+  if (goog.isString(first) && goog.isString(second)) {
+    return first.toUpperCase() == second.toUpperCase();
   } else {
-    return value == attributeValue;
+    return first == second;
   }
 };
 
 
 /**
  * Case insensitive comparison for non-equality.
- * @param {string} attribute Name of the attribute.
- * @param {string} value Value to test for non-equality.
+ * @param {*} first First value.
+ * @param {*} second Second value.
  * @this {ol.Feature}
  */
-ol.expr.lib[ol.expr.functions.INEQ] = function(attribute, value) {
-  var attributeValue = this.get(attribute);
-  if (goog.isString(value) && goog.isString(attributeValue)) {
-    return value.toUpperCase() == attributeValue.toUpperCase();
+ol.expr.lib[ol.expr.functions.INEQ] = function(first, second) {
+  if (goog.isString(first) && goog.isString(second)) {
+    return first.toUpperCase() != second.toUpperCase();
   } else {
-    return value != attributeValue;
+    return first != second;
   }
 };
 
diff --git a/test/spec/ol/expr/expression.test.js b/test/spec/ol/expr/expression.test.js
index 009f467a2e..3e6724283f 100644
--- a/test/spec/ol/expr/expression.test.js
+++ b/test/spec/ol/expr/expression.test.js
@@ -788,6 +788,44 @@ describe('ol.expr.lib', function() {
 
   });
 
+  describe('ieq()', function() {
+
+    var one = new ol.Feature({foo: 'Bar'});
+    var two = new ol.Feature({bar: 'Foo'});
+
+    var ieq1 = parse('ieq(foo, "bar")');
+    var ieq2 = parse('ieq("foo", bar)');
+
+    it('case-insensitive equality for an attribute', function() {
+      expect(evaluate(ieq1, one), true);
+    });
+
+    it('case-insensitive equality for an attribute as second argument',
+        function() {
+          expect(evaluate(ieq2, two), true);
+        });
+
+  });
+
+  describe('ineq()', function() {
+
+    var one = new ol.Feature({foo: 'Bar'});
+    var two = new ol.Feature({bar: 'Foo'});
+
+    var ieq1 = parse('ineq(foo, "bar")');
+    var ieq2 = parse('ineq("foo", bar)');
+
+    it('case-insensitive non-equality for an attribute', function() {
+      expect(evaluate(ieq1, one), false);
+    });
+
+    it('case-insensitive non-equality for an attribute as second argument',
+        function() {
+          expect(evaluate(ieq2, two), false);
+        });
+
+  });
+
 });
 
 describe('ol.expr.register()', function() {