diff --git a/caddy.go b/caddy.go
index c1f9ecae6..44fc1a2d8 100644
--- a/caddy.go
+++ b/caddy.go
@@ -999,7 +999,6 @@ var (
 	DefaultConfigFile = "Caddyfile"
 )
 
-var clusterPluginSetup int32 // access atomically
 
 // CtxKey is a value type for use with context.WithValue.
 type CtxKey string