diff --git a/src/object-mapper.js b/src/object-mapper.js
index e6451a7..be5ff7c 100644
--- a/src/object-mapper.js
+++ b/src/object-mapper.js
@@ -76,7 +76,7 @@ function _map(fromObject, toObject, propertyMap, propertyKeys) {
 function _mapKey(fromObject, fromKey, toObject, toKey) {
   var fromValue
     , restToKeys
-    , _default = null
+    , _default // = null
     , transform
     ;
 
@@ -87,14 +87,14 @@ function _mapKey(fromObject, fromKey, toObject, toKey) {
   }
 
   if (toKey instanceof Object && Object.getPrototypeOf(toKey) === Object.prototype) {
-    _default = toKey.default || null;
+    _default = toKey.default; // || null;
     transform = toKey.transform;
     toKey = toKey.key;
   }
 
   if (Array.isArray(toKey)) {
     transform = toKey[1];
-    _default = toKey[2] || null;
+    _default = toKey[2]; // || null;
     toKey = toKey[0];
   }
 
@@ -103,7 +103,7 @@ function _mapKey(fromObject, fromKey, toObject, toKey) {
   }
 
   fromValue = getKeyValue(fromObject, fromKey);
-  if (typeof fromValue === 'undefined' || fromValue === null) {
+  if (typeof fromValue === 'undefined') { // || fromValue === null) {
     fromValue = _default;
   }
 
diff --git a/test/test.js b/test/test.js
index e2a0ba3..ee4c6f1 100644
--- a/test/test.js
+++ b/test/test.js
@@ -1653,6 +1653,8 @@ test('original various tests', function (t) {
   t.deepEqual(result, expected, 'override sku');
 
   obj["inventory"] = null;
+  map["inventory.onHandQty"] = {key: ["Envelope.Request.Item.Inventory?", null, null]};
+  map["inventory.replenishQty"] = {key: ["Envelope.Request.Item.RelpenishQuantity?", null, null]};
   expected.Envelope.Request.Item.Inventory = null;
 
   result = merge(obj, {}, map);
@@ -1781,5 +1783,56 @@ test('Mapping source key properties with wrong escaped dot', function (t) {
   t.end();
 });
 
+test('do not map when a property not present in source and default is not given in map', function (t) {
+  var expect = {
+    mapThis: 'defaultVal',
+    mapThisToo: [ {
+      property: 'defaultVal',
+      subArray: [ { property: null } ]
+    } ],
+    other: 'otherVal'
+  };
 
+  var map = {
+    "doNotMapThis": {
+      "key": "doNotMapThis",
+      "transform": function(val) {
+        return "_" + val;
+      }
+    },
+    "doNotMapThisToo[].property": {
+      "key": "doNotMapThisToo[].property",
+      "transform": function(val) {
+        return "_" + val;
+      }
+    },
+    "doNotMapThisToo[].subArray[].property": {
+      "key": "doNotMapThisToo[].subArray[].property",
+      "transform": function(val) {
+        return "_" + val;
+      }
+    },
+    "mapThis": {
+      "key": "mapThis",
+      "default": "defaultVal"
+    },
+    "mapThisToo[].property": {
+      "key": "mapThisToo[].property",
+      "default": "defaultVal"
+    },
+    "mapThisToo[].subArray[].property": {
+      "key": "mapThisToo[].subArray[].property?",
+      "default": null 
+    },
+    "other": "other"
+  };
+
+  var obj = {
+    "other": "otherVal"    
+  };
 
+  var result = om(obj, map);
+
+  t.deepEqual(result, expect);
+  t.end();
+});