diff --git a/types/jquery.pnotify/index.d.ts b/types/jquery.pnotify/index.d.ts
index 07de33d2d9..2c82c1269a 100644
--- a/types/jquery.pnotify/index.d.ts
+++ b/types/jquery.pnotify/index.d.ts
@@ -338,7 +338,7 @@ interface PNotifyConstructor {
     /**
      * Reposition the notices, optionally animating their movement.
      */
-    positionAll(animate?: string): void
+    positionAll(animate?: boolean): void
 }
 
 declare var PNotify: PNotifyConstructor;