diff --git a/types/redis/index.d.ts b/types/redis/index.d.ts
index 6417afabf9..db0dd122ba 100644
--- a/types/redis/index.d.ts
+++ b/types/redis/index.d.ts
@@ -472,8 +472,8 @@ export interface Commands<R> {
     /**
      * Get all fields and values in a hash.
      */
-    hgetall(key: string, cb: Callback<{ [key: string]: string }>): R;
-    HGETALL(key: string, cb: Callback<{ [key: string]: string }>): R;
+    hgetall(key: string, cb?: Callback<{ [key: string]: string }>): R;
+    HGETALL(key: string, cb?: Callback<{ [key: string]: string }>): R;
 
     /**
      * Increment the integer value of a hash field by the given number.