diff --git a/tokio/src/runtime/scheduler/multi_thread/idle.rs b/tokio/src/runtime/scheduler/multi_thread/idle.rs
index 5c2c13527..9dcee08bc 100644
--- a/tokio/src/runtime/scheduler/multi_thread/idle.rs
+++ b/tokio/src/runtime/scheduler/multi_thread/idle.rs
@@ -98,6 +98,10 @@ impl Idle {
             return;
         }
 
+        if self.num_idle.load(Acquire) == 0 {
+            return;
+        }
+
         // There aren't any searching workers. Try to initialize one
         if self
             .num_searching