diff --git a/underscore-ko/underscore-ko.d.ts b/underscore-ko/underscore-ko.d.ts
index c10b49d43..241a0db12 100644
--- a/underscore-ko/underscore-ko.d.ts
+++ b/underscore-ko/underscore-ko.d.ts
@@ -8,18 +8,18 @@
 
 interface KnockoutObservableArrayFunctions {
 
-    /****
-     Collections
-    *****/
-    each(iterator: ListIterator, context?: any): any[];
-    each(iterator: ObjectIterator, context?: any): any[];
-    forEach(iterator: ObjectIterator, context?: any): any[];
-    forEach(iterator: ListIterator, context?: any): any[];
+  /****
+   Collections
+  *****/
+    each(iterator: _.ListIterator<any, any>, context?: any): any[];
+    each(iterator: _.ObjectIterator<any, any>, context?: any): any[];
+    forEach(iterator: _.ObjectIterator<any, any>, context?: any): any[];
+    forEach(iterator: _.ListIterator<any, any>, context?: any): any[];
 
-    map(iterator: ListIterator, context?: any): any[];
-    map(iterator: ObjectIterator, context?: any): any[];
-    collect(iterator: ListIterator, context?: any): any[];
-    collect(iterator: ObjectIterator, context?: any): any[];
+    map(iterator: _.ListIterator<any, any>, context?: any): any[];
+    map(iterator: _.ObjectIterator<any, any>, context?: any): any[];
+    collect(iterator: _.ListIterator<any, any>, context?: any): any[];
+    collect(iterator: _.ObjectIterator<any, any>, context?: any): any[];
 
     reduce(iterator: any, memo: any, context?: any): any;
     inject(iterator: any, memo: any, context?: any): any;
@@ -97,5 +97,5 @@ interface KnockoutObservableArrayFunctions {
     /****
      Chaining
     *****/
-    chain(object: any): UnderscoreWrappedObject;
+    chain(object: any): any;
 }
diff --git a/underscore/underscore.d.ts b/underscore/underscore.d.ts
index d0ad26e1b..c42eeed03 100644
--- a/underscore/underscore.d.ts
+++ b/underscore/underscore.d.ts
@@ -14,11 +14,11 @@ declare module _ {
         escape?: RegExp;
     }
 
-    interface ListIterator<T, TResult> {
+    export interface ListIterator<T, TResult> {
         (value: T, index: number, list?: List<T>): TResult;
     }
 
-    interface ObjectIterator<T, TResult> {
+    export interface ObjectIterator<T, TResult> {
         (element: T, key: string, list?: any): TResult;
     }