diff --git a/lodash/lodash-tests.ts b/lodash/lodash-tests.ts
index 20a46fa827..f9fcdad509 100644
--- a/lodash/lodash-tests.ts
+++ b/lodash/lodash-tests.ts
@@ -6184,10 +6184,9 @@ module TestFindKey {
 
 // _.findLastKey
 module TestFindLastKey {
-    let result: string;
-
     {
         let predicateFn: (value: any, key?: string, object?: {}) => boolean;
+        let result: string;
 
         result = _.findLastKey<{a: string;}>({a: ''});
 
@@ -6214,6 +6213,7 @@ module TestFindLastKey {
 
     {
         let predicateFn: (value: string, key?: string, collection?: _.Dictionary<string>) => boolean;
+        let result: string;
 
         result = _.findLastKey<string, {a: string;}>({a: ''}, predicateFn);
         result = _.findLastKey<string, {a: string;}>({a: ''}, predicateFn, any);
@@ -6221,6 +6221,30 @@ module TestFindLastKey {
         result = _<{a: string;}>({a: ''}).findLastKey<string>(predicateFn);
         result = _<{a: string;}>({a: ''}).findLastKey<string>(predicateFn, any);
     }
+
+    {
+        let predicateFn: (value: any, key?: string, object?: {}) => boolean;
+        let result: _.LoDashExplicitWrapper<string>;
+
+        result = _<{a: string;}>({a: ''}).chain().findLastKey();
+
+        result = _<{a: string;}>({a: ''}).chain().findLastKey(predicateFn);
+        result = _<{a: string;}>({a: ''}).chain().findLastKey(predicateFn, any);
+
+
+        result = _<{a: string;}>({a: ''}).chain().findLastKey('');
+        result = _<{a: string;}>({a: ''}).chain().findLastKey('', any);
+
+        result = _<{a: string;}>({a: ''}).chain().findLastKey<{a: number;}>({a: 42});
+    }
+
+    {
+        let predicateFn: (value: string, key?: string, collection?: _.Dictionary<string>) => boolean;
+        let result: _.LoDashExplicitWrapper<string>;
+
+        result = _<{a: string;}>({a: ''}).chain().findLastKey<string>(predicateFn);
+        result = _<{a: string;}>({a: ''}).chain().findLastKey<string>(predicateFn, any);
+    }
 }
 
 // _.forIn
diff --git a/lodash/lodash.d.ts b/lodash/lodash.d.ts
index d32db4e481..97b82eacf4 100644
--- a/lodash/lodash.d.ts
+++ b/lodash/lodash.d.ts
@@ -10620,6 +10620,39 @@ declare module _ {
         ): string;
     }
 
+    interface LoDashExplicitObjectWrapper<T> {
+        /**
+         * @see _.findLastKey
+         */
+        findLastKey<TValues>(
+            predicate?: DictionaryIterator<TValues, boolean>,
+            thisArg?: any
+        ): LoDashExplicitWrapper<string>;
+
+        /**
+         * @see _.findLastKey
+         */
+        findLastKey(
+            predicate?: ObjectIterator<any, boolean>,
+            thisArg?: any
+        ): LoDashExplicitWrapper<string>;
+
+        /**
+         * @see _.findLastKey
+         */
+        findLastKey(
+            predicate?: string,
+            thisArg?: any
+        ): LoDashExplicitWrapper<string>;
+
+        /**
+         * @see _.findLastKey
+         */
+        findLastKey<TWhere extends Dictionary<any>>(
+            predicate?: TWhere
+        ): LoDashExplicitWrapper<string>;
+    }
+
     //_.forIn
     interface LoDashStatic {
         /**