diff --git a/Foundation/CPPredicate/CPComparisonPredicate.j b/Foundation/CPPredicate/CPComparisonPredicate.j
index 15a44be33..cac3d5fe0 100644
--- a/Foundation/CPPredicate/CPComparisonPredicate.j
+++ b/Foundation/CPPredicate/CPComparisonPredicate.j
@@ -287,10 +287,13 @@
         rightIsNil = (rhs == nil || [rhs isEqual:[CPNull null]]);
 
     if ((leftIsNil || rightIsNil) && _type != CPCustomSelectorPredicateOperatorType)
-        return (leftIsNil == rightIsNil &&
-               (_type == CPEqualToPredicateOperatorType ||
-                _type == CPLessThanOrEqualToPredicateOperatorType ||
-                _type == CPGreaterThanOrEqualToPredicateOperatorType));
+        return (leftIsNil === rightIsNil &&
+               (_type === CPEqualToPredicateOperatorType ||
+                _type === CPLessThanOrEqualToPredicateOperatorType ||
+                _type === CPGreaterThanOrEqualToPredicateOperatorType))
+               ||
+               (leftIsNil !== rightIsNil &&
+               (_type === CPNotEqualToPredicateOperatorType));
 
     var string_compare_options = 0;
 
diff --git a/Tests/Foundation/CPPredicateTest.j b/Tests/Foundation/CPPredicateTest.j
index 3a9840e96..f57868a9d 100644
--- a/Tests/Foundation/CPPredicateTest.j
+++ b/Tests/Foundation/CPPredicateTest.j
@@ -271,6 +271,22 @@
     pred = [[CPComparisonPredicate alloc] initWithLeftExpression:[CPExpression expressionForConstantValue:nil] rightExpression:[CPExpression expressionForConstantValue:nil] modifier:CPDirectPredicateModifier type:CPBeginsWithPredicateOperatorType options:0];
 
     [self assertFalse:[pred evaluateWithObject:dict] message:"'" + [pred description]  + "' should be false"];
+
+    pred = [[CPComparisonPredicate alloc] initWithLeftExpression:[CPExpression expressionForConstantValue:nil] rightExpression:[CPExpression expressionForConstantValue:nil] modifier:CPDirectPredicateModifier type:CPEqualToPredicateOperatorType options:0];
+
+    [self assertTrue:[pred evaluateWithObject:dict] message:"'" + [pred description]  + "' should be true"];
+
+    pred = [[CPComparisonPredicate alloc] initWithLeftExpression:[CPExpression expressionForConstantValue:nil] rightExpression:[CPExpression expressionForConstantValue:nil] modifier:CPDirectPredicateModifier type:CPNotEqualToPredicateOperatorType options:0];
+
+    [self assertFalse:[pred evaluateWithObject:dict] message:"'" + [pred description]  + "' should be false"];
+
+    pred = [[CPComparisonPredicate alloc] initWithLeftExpression:[CPExpression expressionForConstantValue:@"Something"] rightExpression:[CPExpression expressionForConstantValue:nil] modifier:CPDirectPredicateModifier type:CPEqualToPredicateOperatorType options:0];
+
+    [self assertFalse:[pred evaluateWithObject:dict] message:"'" + [pred description]  + "' should be false"];
+
+    pred = [[CPComparisonPredicate alloc] initWithLeftExpression:[CPExpression expressionForConstantValue:@"Something"] rightExpression:[CPExpression expressionForConstantValue:nil] modifier:CPDirectPredicateModifier type:CPNotEqualToPredicateOperatorType options:0];
+
+    [self assertTrue:[pred evaluateWithObject:dict] message:"'" + [pred description]  + "' should be true"];
 }
 
 - (void)testPredicateParsing