diff --git a/cli/compose/schema/schema.go b/cli/compose/schema/schema.go
index 9d2a58e8b3..c7786f48fb 100644
--- a/cli/compose/schema/schema.go
+++ b/cli/compose/schema/schema.go
@@ -17,7 +17,7 @@ const (
 
 type portsFormatChecker struct{}
 
-func (checker portsFormatChecker) IsFormat(input interface{}) bool {
+func (checker portsFormatChecker) IsFormat(_ interface{}) bool {
 	// TODO: implement this
 	return true
 }