diff --git a/src/uxncli.c b/src/uxncli.c
index a00cbf5..669b8d6 100644
--- a/src/uxncli.c
+++ b/src/uxncli.c
@@ -27,6 +27,8 @@ error(char *msg, const char *err)
 void
 system_deo_special(Device *d, Uint8 port)
 {
+	(void)d;
+	(void)port;
 }
 
 static void