diff --git a/include/mifare.h b/include/mifare.h
index f66263282..bd78dda6b 100644
--- a/include/mifare.h
+++ b/include/mifare.h
@@ -61,5 +61,19 @@ typedef enum ISO14B_COMMAND {
 	ISO14B_SELECT_SR =			(1 << 7)
 } iso14b_command_t;
 
+//-----------------------------------------------------------------------------
+// "hf 14a sim x", "hf mf sim x" attacks
+//-----------------------------------------------------------------------------
+typedef struct {
+  uint32_t cuid;
+  uint8_t  sector;
+  uint8_t  keytype;
+  uint32_t nonce;
+  uint32_t ar;
+  uint32_t nr;
+  uint32_t nonce2;
+  uint32_t ar2;
+  uint32_t nr2;
+} nonces_t;
 
 #endif // _MIFARE_H_