diff --git a/types/underscore/index.d.ts b/types/underscore/index.d.ts
index 2803c89b96..8ef77dff02 100644
--- a/types/underscore/index.d.ts
+++ b/types/underscore/index.d.ts
@@ -1,6 +1,6 @@
 // Type definitions for Underscore 1.8
 // Project: http://underscorejs.org/
-// Definitions by: Boris Yankov <https://github.com/borisyankov>, Josh Baldwin <https://github.com/jbaldwin>, Christopher Currens <https://github.com/ccurrens>
+// Definitions by: Boris Yankov <https://github.com/borisyankov>, Josh Baldwin <https://github.com/jbaldwin>, Christopher Currens <https://github.com/ccurrens>, Cassey Lottman <https://github.com/clottman>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 declare var _: _.UnderscoreStatic;
@@ -920,7 +920,7 @@ declare module _ {
         **/
         uniq<T, TSort>(
             array: _.List<T>,
-            iterator?: _.ListIterator<T, TSort>,
+            iterator?: _.ListIterator<T, TSort> | _.IterateePropertyShorthand,
             context?: any): T[];
 
         /**
@@ -937,7 +937,7 @@ declare module _ {
         unique<T, TSort>(
             array: _.List<T>,
             isSorted?: boolean,
-            iterator?: _.ListIterator<T, TSort>,
+            iterator?: _.ListIterator<T, TSort>  | _.IterateePropertyShorthand,
             context?: any): T[];
 
 
@@ -4512,7 +4512,7 @@ declare module _ {
         * Wrapped type `any[]`.
         * @see _.uniq
         **/
-        uniq(isSorted?: boolean, iterator?: _.ListIterator<T, any>): T[];
+        uniq(isSorted?: boolean, iterator?: _.ListIterator<T, any> |  _.IterateePropertyShorthand): T[];
 
         /**
         * Wrapped type `any[]`.
@@ -5472,23 +5472,23 @@ declare module _ {
         * Wrapped type `any[]`.
         * @see _.uniq
         **/
-        uniq(isSorted?: boolean, iterator?: _.ListIterator<T, any>): _Chain<T>;
+        uniq(isSorted?: boolean, iterator?: _.ListIterator<T, any> | _.IterateePropertyShorthand): _Chain<T>;
 
         /**
         * Wrapped type `any[]`.
         * @see _.uniq
         **/
-        uniq<TSort>(iterator?: _.ListIterator<T, TSort>, context?: any): _Chain<T>;
+        uniq<TSort>(iterator?: _.ListIterator<T, TSort> | _.IterateePropertyShorthand, context?: any): _Chain<T>;
 
         /**
         * @see _.uniq
         **/
-        unique<TSort>(isSorted?: boolean, iterator?: _.ListIterator<T, TSort>): _Chain<T>;
+        unique<TSort>(isSorted?: boolean, iterator?: _.ListIterator<T, TSort> | _.IterateePropertyShorthand): _Chain<T>;
 
         /**
         * @see _.uniq
         **/
-        unique<TSort>(iterator?: _.ListIterator<T, TSort>, context?: any): _Chain<T>;
+        unique<TSort>(iterator?: _.ListIterator<T, TSort> | _.IterateePropertyShorthand, context?: any): _Chain<T>;
 
         /**
         * Wrapped type `any[][]`.