diff --git a/types/angular/index.d.ts b/types/angular/index.d.ts
index 99977b57b5..fe90fa15b8 100644
--- a/types/angular/index.d.ts
+++ b/types/angular/index.d.ts
@@ -1316,7 +1316,7 @@ declare namespace angular {
          *
          * @param key the key of the data to be retrieved
          */
-        get<T>(key: string): T;
+        get<T>(key: string): T | undefined;
 
         /**
          * Removes an entry from the Cache object.