diff --git a/libcacard/vcardt.h b/libcacard/vcardt.h
index 538bdde3df..3b9a6199c0 100644
--- a/libcacard/vcardt.h
+++ b/libcacard/vcardt.h
@@ -26,9 +26,17 @@ typedef struct VCardEmulStruct VCardEmul;
 #define MAX_CHANNEL 4
 
 /* create an ATR with appropriate historical bytes */
-#define VCARD_ATR_PREFIX(size) 0x3b, 0x66+(size), 0x00, 0xff, \
-                               'V', 'C', 'A', 'R', 'D', '_'
+#define TS_DIRECT_CONVENTION 0x3b
+#define TA_PRESENT 0x10
+#define TB_PRESENT 0x20
+#define TC_PRESENT 0x40
+#define TD_PRESENT 0x80
 
+#define VCARD_ATR_PREFIX(size) \
+    TS_DIRECT_CONVENTION, \
+    TD_PRESENT + (6 + size), \
+    0x00, \
+    'V', 'C', 'A', 'R', 'D', '_'
 
 typedef enum {
     VCARD_DONE,