diff --git a/src/scheduler.c b/src/scheduler.c
index 6fe50550530784d4814d245358eae08f97a7486d..fa9348cd2579c15039228c68ac308fd42a9210a1 100644
--- a/src/scheduler.c
+++ b/src/scheduler.c
@@ -269,6 +269,11 @@ void rt_schedule(void)
             rt_hw_interrupt_enable(level);
         }
     }
+    else
+    {
+        /* enable interrupt */
+        rt_hw_interrupt_enable(level);
+    }
 }
 
 /*