diff --git a/gprs_bssgp_pcu.h b/gprs_bssgp_pcu.h
index 0f8dd83..8b7efeb 100644
--- a/gprs_bssgp_pcu.h
+++ b/gprs_bssgp_pcu.h
@@ -45,7 +45,7 @@
 #define BSSGP_HDR_LEN 53
 #define NS_HDR_LEN 4
 #define MAX_LEN_PDU 60
-#define IE_PDU 14
+#define IE_LLC_PDU 14
 #define BLOCK_DATA_LEN 20
 #define BLOCK_LEN 23