diff --git a/lodash/lodash-tests.ts b/lodash/lodash-tests.ts
index cd84de417..709151f16 100644
--- a/lodash/lodash-tests.ts
+++ b/lodash/lodash-tests.ts
@@ -247,9 +247,10 @@ result = <Array<number>>_.flatten([1, [2], [[3]]], true);
 result = <Array<number>>_.flatten<number>([1, [2], [3, [[4]]]], true);
 result = <Array<number|boolean>>_.flatten<number|boolean>([1, [2], [3, [[false]]]], true);
 
-result = <_.LoDashArrayWrapper<number>>_([1, [2], [3, [[4]]]]).flatten();
+result = <_.LoDashArrayWrapper<number>>_([[1, 2], [3, 4], 5, 6]).flatten();
+result = <_.LoDashArrayWrapper<number|Array<Array<number>>>>_([1, [2], [3, [[4]]]]).flatten();
+
 result = <_.LoDashArrayWrapper<number>>_([1, [2], [3, [[4]]]]).flatten(true);
-result = <_.LoDashArrayWrapper<string>>_(stoogesQuotes).flatten('quotes');
 
 result = <number>_.indexOf([1, 2, 3, 1, 2, 3], 2);
 result = <number>_.indexOf([1, 2, 3, 1, 2, 3], 2, 3);
diff --git a/lodash/lodash.d.ts b/lodash/lodash.d.ts
index 8c265cb8f..c0f0bd5d5 100644
--- a/lodash/lodash.d.ts
+++ b/lodash/lodash.d.ts
@@ -795,50 +795,14 @@ declare module _ {
 
     interface LoDashArrayWrapper<T> {
         /**
-        * @see _.flatten
-        **/
-        flatten<Flat>(isShallow?: boolean): LoDashArrayWrapper<Flat>;
+         * @see _.flatten
+         **/
+        flatten<T>(): LoDashArrayWrapper<any>;
 
         /**
         * @see _.flatten
         **/
-        flatten<Flat>(
-            isShallow: boolean,
-            callback: ListIterator<T, Flat>,
-            thisArg?: any): LoDashArrayWrapper<Flat>;
-
-        /**
-        * @see _.flatten
-        **/
-        flatten<Flat>(
-            callback: ListIterator<T, Flat>,
-            thisArg?: any): LoDashArrayWrapper<Flat>;
-
-        /**
-        * @see _.flatten
-        **/
-        flatten<Flat>(
-            isShallow: boolean,
-            pluckValue: string): LoDashArrayWrapper<Flat>;
-
-        /**
-        * @see _.flatten
-        **/
-        flatten<Flat>(
-            pluckValue: string): LoDashArrayWrapper<Flat>;
-
-        /**
-        * @see _.flatten
-        **/
-        flatten<Flat, W>(
-            isShallow: boolean,
-            whereValue: W): LoDashArrayWrapper<Flat>;
-
-        /**
-        * @see _.flatten
-        **/
-        flatten<Flat, W>(
-            whereValue: W): LoDashArrayWrapper<Flat>;
+        flatten<T>(isShallow: boolean): LoDashArrayWrapper<any>;
     }
 
     //_.indexOf