diff --git a/actix-server/src/accept.rs b/actix-server/src/accept.rs
index 147cbf23..026bcc37 100644
--- a/actix-server/src/accept.rs
+++ b/actix-server/src/accept.rs
@@ -113,7 +113,7 @@ impl Availability {
         } else if idx < 128 * 4 {
             (3, idx - 128 * 3)
         } else {
-            unreachable!("Max WorkerHandle count is 512")
+            panic!("Max WorkerHandle count is 512")
         };
 
         if avail {