diff --git a/pkg/transport/timeout_transport.go b/pkg/transport/timeout_transport.go
index 742cc5cbf..ea16b4c0f 100644
--- a/pkg/transport/timeout_transport.go
+++ b/pkg/transport/timeout_transport.go
@@ -35,7 +35,7 @@ func NewTimeoutTransport(info TLSInfo, dialtimeoutd, rdtimeoutd, wtimeoutd time.
 		// it should not be put back to http transport as an idle connection for future usage.
 		tr.MaxIdleConnsPerHost = -1
 	} else {
-		// allow more idle connections between peers to avoid unncessary port allocation.
+		// allow more idle connections between peers to avoid unnecessary port allocation.
 		tr.MaxIdleConnsPerHost = 1024
 	}