diff --git a/lib/model.js b/lib/model.js
index a8bfaa0..88c768f 100644
--- a/lib/model.js
+++ b/lib/model.js
@@ -13,7 +13,7 @@ var dateToJSON = function () { return { $$date: this.getTime() }; }
   , lastStepModifierFunctions = {}
   , comparisonFunctions = {}
   , logicalOperators = {}
-  , queryOperatorArray = {}
+  , arrayComparisonFunctions = {}
   ;
 
 
@@ -584,7 +584,7 @@ comparisonFunctions.$exists = function (value, exists) {
   }
 };
 
-queryOperatorArray.$size = function (obj, value) {
+arrayComparisonFunctions.$size = function (obj, value) {
     if (!util.isArray(obj)) { return false; }
     if (value % 1 !== 0) { throw "$size operator called without an integer"; }
 
@@ -685,8 +685,8 @@ function matchQueryPart (obj, queryKey, queryValue) {
       firstChars = _.map(keys, function (item) { return item[0]; });
       dollarFirstChars = _.filter(firstChars, function (c) { return c === '$'; });
 
-      if (keys.length == 1 && dollarFirstChars.length > 0 && queryOperatorArray[keys[0]]) {
-        if (!queryOperatorArray[keys[0]](objValue, queryValue[keys[0]])) { return false; }
+      if (keys.length == 1 && dollarFirstChars.length > 0 && arrayComparisonFunctions[keys[0]]) {
+        if (!arrayComparisonFunctions[keys[0]](objValue, queryValue[keys[0]])) { return false; }
         return true;
       }
     }
diff --git a/test/model.test.js b/test/model.test.js
index 64f60d9..b9acbc0 100644
--- a/test/model.test.js
+++ b/test/model.test.js
@@ -1081,7 +1081,7 @@ describe('Model', function () {
     });
 
     
-    describe('Query operator array $size', function () {
+    describe.only('Query operator array $size', function () {
 
         it('Can query on the size of an array field', function () {
           // Non nested documents