diff --git a/cmd/lambda/lambda.go b/cmd/lambda/lambda.go
index e8effcb..60070fc 100644
--- a/cmd/lambda/lambda.go
+++ b/cmd/lambda/lambda.go
@@ -11,7 +11,7 @@ func Lambda() *cobra.Command {
 		Use:   "lambda",
 		Short: "Lambda calculus interpreter",
 		Long:  "A lambda calculus interpreter supporting multiple representations.",
-		RunE: func(cmd *cobra.Command, args []string) error {
+		RunE: func(cmd *cobra.Command, _ []string) error {
 			return cmd.Help()
 		},
 	}