diff --git a/ioredis/index.d.ts b/ioredis/index.d.ts
index 9fa66ad2b6..16b33400c3 100644
--- a/ioredis/index.d.ts
+++ b/ioredis/index.d.ts
@@ -338,6 +338,7 @@ declare module IORedis {
 
         scanStream(options?: IORedis.ScanStreamOption): NodeJS.EventEmitter;
         hscanStream(key: string, options?: IORedis.ScanStreamOption): NodeJS.EventEmitter;
+        zscanStream(key: string, options?: IORedis.ScanStreamOption): NodeJS.EventEmitter;
     }
 
     interface Pipeline {
@@ -719,4 +720,4 @@ declare module IORedis {
         retryDelayOnTryAgain?: number;
         redisOptions?: RedisOptions;
     }
-}
\ No newline at end of file
+}