diff --git a/options.go b/options.go
index 58eb5dd..a0ead16 100644
--- a/options.go
+++ b/options.go
@@ -81,10 +81,10 @@
 
 // WithDebugOutput sets debug output.
 func WithDebugOutput(w io.Writer) ContainerOption {
+	if w == nil {
+		return nil
+	}
 	return func(s *pState) {
-		if w == nil {
-			return
-		}
 		s.debugOut = w
 	}
 }