diff --git a/daemon/libnetwork/ns/init_linux.go b/daemon/libnetwork/ns/init_linux.go
index 1682d1d586..266875a738 100644
--- a/daemon/libnetwork/ns/init_linux.go
+++ b/daemon/libnetwork/ns/init_linux.go
@@ -15,7 +15,7 @@ import (
 )
 
 // NetlinkSocketsTimeout represents the default timeout duration for the sockets.
-var NetlinkSocketsTimeout = 3 * time.Second
+const NetlinkSocketsTimeout = 3 * time.Second
 
 // initNamespace initializes a new network namespace.
 var initNamespace = sync.OnceValues(initHandles)