diff --git a/lib/relation-definition.js b/lib/relation-definition.js
index 3b93763f..e608a338 100644
--- a/lib/relation-definition.js
+++ b/lib/relation-definition.js
@@ -189,10 +189,11 @@ RelationDefinition.prototype.applyScope = function(modelInstance, filter) {
       filter.where[discriminator] = this.modelFrom.modelName;
     }
   }
+  var scope;
   if (typeof this.scope === 'function') {
-    var scope = this.scope.call(this, modelInstance, filter);
+    scope = this.scope.call(this, modelInstance, filter);
   } else {
-    var scope = this.scope;
+    scope = this.scope;
   }
   if (typeof scope === 'object') {
     mergeQuery(filter, scope);
@@ -207,25 +208,27 @@ RelationDefinition.prototype.applyScope = function(modelInstance, filter) {
 RelationDefinition.prototype.applyProperties = function(modelInstance, obj) {
   var source = modelInstance, target = obj;
   if (this.options.invertProperties) {
-    source = obj, target = modelInstance;
+    source = obj;
+    target = modelInstance;
   }
   if (this.options.embedsProperties) {
     target = target.__data[this.name] = {};
     target[this.keyTo] = source[this.keyTo];
   }
+  var k, key;
   if (typeof this.properties === 'function') {
     var data = this.properties.call(this, source, target);
-    for(var k in data) {
+    for(k in data) {
       target[k] = data[k];
     }
   } else if (Array.isArray(this.properties)) {
-    for(var k = 0; k < this.properties.length; k++) {
-      var key = this.properties[k];
+    for(k = 0; k < this.properties.length; k++) {
+      key = this.properties[k];
       target[key] = source[key];
     }
   } else if (typeof this.properties === 'object') {
-    for(var k in this.properties) {
-      var key = this.properties[k];
+    for(k in this.properties) {
+      key = this.properties[k];
       target[key] = source[k];
     }
   }