@@ -164,10 +164,15 @@
 #define GSCIS_AID_CCC                 0xA0, 0x00, 0x00, 0x01, 0x16, 0xDB, 0x00
 
 /* Maximum size of data portion of APDUs */
 /** Do not set this above 250 **/
 #define CACKEY_APDU_MTU               250
+
+/* ATR If not available */
+#ifndef MAX_ATR_SIZE
+#define MAX_ATR_SIZE 1024
+#endif
 
 #ifdef CACKEY_DEBUG
 #  ifdef HAVE_TIME_H
 #    include <time.h>
 static time_t cackey_debug_start_time = 0;