diff --git a/index-scheduler/src/lib.rs b/index-scheduler/src/lib.rs
index b110e2bcf..6c797ea93 100644
--- a/index-scheduler/src/lib.rs
+++ b/index-scheduler/src/lib.rs
@@ -518,6 +518,7 @@ impl IndexScheduler {
             }
         }
 
+        self.wake_up.signal();
         Ok(task)
     }