diff --git a/lodash/lodash-3.10.d.ts b/lodash/lodash-3.10.d.ts
index cd63bb772..5e96e2fda 100644
--- a/lodash/lodash-3.10.d.ts
+++ b/lodash/lodash-3.10.d.ts
@@ -9601,16 +9601,17 @@ declare module _ {
          * @param resolver The function to resolve the cache key.
          * @return Returns the new memoizing function.
          */
-        memoize<TResult extends MemoizedFunction>(
-            func: Function,
-            resolver?: Function): TResult;
+        memoize: {
+            <T extends Function>(func: T, resolver?: Function): T & MemoizedFunction;
+            Cache: MapCache;
+        }
     }
 
     interface LoDashImplicitObjectWrapper<T> {
         /**
          * @see _.memoize
          */
-        memoize<TResult extends MemoizedFunction>(resolver?: Function): LoDashImplicitObjectWrapper<TResult>;
+        memoize(resolver?: Function): LoDashImplicitObjectWrapper<T & MemoizedFunction>;
     }
 
     //_.modArgs
diff --git a/lodash/lodash-tests-3.10.ts b/lodash/lodash-tests-3.10.ts
index a021f9ec3..3399f71fe 100644
--- a/lodash/lodash-tests-3.10.ts
+++ b/lodash/lodash-tests-3.10.ts
@@ -5959,17 +5959,28 @@ module TestFlowRight {
 }
 
 // _.memoize
-var testMemoizedFunction: _.MemoizedFunction;
-result = <_.MapCache>testMemoizedFunction.cache;
-interface TestMemoizedResultFn extends _.MemoizedFunction {
-    (...args: any[]): any;
+namespace TestMemoize {
+    var testMemoizedFunction: _.MemoizedFunction;
+    var cache = <_.MapCache>testMemoizedFunction.cache;
+    interface TestMemoizedResultFn extends _.MemoizedFunction {
+        (a1: string, a2: number): boolean;
+    }
+    var testMemoizeFn = (a1: string, a2: number) => a1.length > a2;
+    var testMemoizeResolverFn = (a1: string, a2: number) => a1 + a2;
+    var result: TestMemoizedResultFn;
+    result = _.memoize(testMemoizeFn);
+    result = _.memoize(testMemoizeFn, testMemoizeResolverFn);
+    result = _(testMemoizeFn).memoize().value();
+    result = _(testMemoizeFn).memoize(testMemoizeResolverFn).value();
+    result('foo', 1);
+    result.cache.get('foo1');
+    _.memoize.Cache = {
+        delete: key => false,
+        get: key => undefined,
+        has: key => false,
+        set(key, value) { return this; }
+    };
 }
-var testMemoizeFn: (...args: any[]) => any;
-var testMemoizeResolverFn: (...args: any[]) => any;
-result = <TestMemoizedResultFn>_.memoize<TestMemoizedResultFn>(testMemoizeFn);
-result = <TestMemoizedResultFn>_.memoize<TestMemoizedResultFn>(testMemoizeFn, testMemoizeResolverFn);
-result = <TestMemoizedResultFn>(_(testMemoizeFn).memoize<TestMemoizedResultFn>().value());
-result = <TestMemoizedResultFn>(_(testMemoizeFn).memoize<TestMemoizedResultFn>(testMemoizeResolverFn).value());
 
 // _.modArgs
 module TestModArgs {
diff --git a/lodash/lodash-tests.ts b/lodash/lodash-tests.ts
index ed683b729..5c5244358 100644
--- a/lodash/lodash-tests.ts
+++ b/lodash/lodash-tests.ts
@@ -5201,17 +5201,28 @@ module TestFlowRight {
 }
 
 // _.memoize
-var testMemoizedFunction: _.MemoizedFunction;
-result = <_.MapCache>testMemoizedFunction.cache;
-interface TestMemoizedResultFn extends _.MemoizedFunction {
-    (...args: any[]): any;
+namespace TestMemoize {
+    var testMemoizedFunction: _.MemoizedFunction;
+    var cache = <_.MapCache>testMemoizedFunction.cache;
+    interface TestMemoizedResultFn extends _.MemoizedFunction {
+        (a1: string, a2: number): boolean;
+    }
+    var testMemoizeFn = (a1: string, a2: number) => a1.length > a2;
+    var testMemoizeResolverFn = (a1: string, a2: number) => a1 + a2;
+    var result: TestMemoizedResultFn;
+    result = _.memoize(testMemoizeFn);
+    result = _.memoize(testMemoizeFn, testMemoizeResolverFn);
+    result = _(testMemoizeFn).memoize().value();
+    result = _(testMemoizeFn).memoize(testMemoizeResolverFn).value();
+    result('foo', 1);
+    result.cache.get('foo1');
+    _.memoize.Cache = {
+        delete: key => false,
+        get: key => undefined,
+        has: key => false,
+        set(key, value) { return this; }
+    };
 }
-var testMemoizeFn: (...args: any[]) => any;
-var testMemoizeResolverFn: (...args: any[]) => any;
-result = <TestMemoizedResultFn>_.memoize<TestMemoizedResultFn>(testMemoizeFn);
-result = <TestMemoizedResultFn>_.memoize<TestMemoizedResultFn>(testMemoizeFn, testMemoizeResolverFn);
-result = <TestMemoizedResultFn>(_(testMemoizeFn).memoize<TestMemoizedResultFn>().value());
-result = <TestMemoizedResultFn>(_(testMemoizeFn).memoize<TestMemoizedResultFn>(testMemoizeResolverFn).value());
 
 // _.overArgs
 module TestOverArgs {
diff --git a/lodash/lodash.d.ts b/lodash/lodash.d.ts
index 0c60cf39d..b6e884fc9 100644
--- a/lodash/lodash.d.ts
+++ b/lodash/lodash.d.ts
@@ -8987,16 +8987,17 @@ declare module _ {
          * @param resolver The function to resolve the cache key.
          * @return Returns the new memoizing function.
          */
-        memoize<TResult extends MemoizedFunction>(
-            func: Function,
-            resolver?: Function): TResult;
+        memoize: {
+            <T extends Function>(func: T, resolver?: Function): T & MemoizedFunction;
+            Cache: MapCache;
+        }
     }
 
     interface LoDashImplicitObjectWrapper<T> {
         /**
          * @see _.memoize
          */
-        memoize<TResult extends MemoizedFunction>(resolver?: Function): LoDashImplicitObjectWrapper<TResult>;
+        memoize(resolver?: Function): LoDashImplicitObjectWrapper<T & MemoizedFunction>;
     }
 
     //_.overArgs (was _.modArgs)