diff --git a/src/nfcjlib/core/DESFireEV1.java b/src/nfcjlib/core/DESFireEV1.java
index b737db0..baf1624 100644
--- a/src/nfcjlib/core/DESFireEV1.java
+++ b/src/nfcjlib/core/DESFireEV1.java
@@ -299,9 +299,9 @@ private boolean changeKey(byte keyNo, byte keyVersion, KeyType type, byte[] newK
 		switch (ktype) {
 		case DES:
 		case TDES:
+		case TKTDES:
 			plaintext = type == KeyType.TKTDES ? new byte[32] : new byte[24];
 			break;
-		case TKTDES:
 		case AES:
 			plaintext = new byte[32];
 			break;