diff --git a/test/test_mifare_desfire_ev1_iso.c b/test/test_mifare_desfire_ev1_iso.c
index 14b7ce9..1d99533 100644
--- a/test/test_mifare_desfire_ev1_iso.c
+++ b/test/test_mifare_desfire_ev1_iso.c
@@ -35,7 +35,6 @@ void
 test_mifare_desfire_ev1_iso (void)
 {
     int res;
-    MifareDESFireKey key;
 
     mifare_desfire_auto_authenticate (tag, 0);