diff --git a/include/grgsm/gsm_constants.h b/include/grgsm/gsm_constants.h
index fd1d9e7..2fbfd36 100644
--- a/include/grgsm/gsm_constants.h
+++ b/include/grgsm/gsm_constants.h
@@ -38,7 +38,7 @@
 #define USEFUL_BITS       142  //(2*(DATA_BITS+STEALING_BIT) + N_TRAIN_BITS )
 #define FCCH_BITS         USEFUL_BITS
 #define BURST_SIZE        (USEFUL_BITS+2*TAIL_BITS)
-#define ACCESS_BURST_SIZE 87
+#define ACCESS_BURST_SIZE 88
 #define PROCESSED_CHUNK   BURST_SIZE+2*GUARD_PERIOD
 
 #define SCH_DATA_LEN      39