diff --git a/armsrc/mifareutil.c b/armsrc/mifareutil.c
index 90279be82..179b9c51e 100644
--- a/armsrc/mifareutil.c
+++ b/armsrc/mifareutil.c
@@ -371,7 +371,7 @@ int mifare_ultra_readblock(uint8_t blockNo, uint8_t *blockData) {
 		switch ( res ) {
 			case 0:
 			case 1:
-				break;
+				return res;
 			default:
 				continue;
 		}