diff --git a/openair-cn/GTPV1-U/nw-gtpv1u/src/NwGtpv1u.c b/openair-cn/GTPV1-U/nw-gtpv1u/src/NwGtpv1u.c
index b35339ce6d97e6fdacc71b056872686bf509a1a9..10eeb2869d7415e502c611d0f9c116dfc3d7bd4c 100644
--- a/openair-cn/GTPV1-U/nw-gtpv1u/src/NwGtpv1u.c
+++ b/openair-cn/GTPV1-U/nw-gtpv1u/src/NwGtpv1u.c
@@ -56,6 +56,9 @@ extern "C" {
  *                    P R I V A T E    F U N C T I O N S                    *
  *--------------------------------------------------------------------------*/
 
+#define NW_GTPV1U_EPC_MIN_HEADER_SIZE                                  (8)
+
+
 void
 nwGtpv1uDisplayBanner(void)
 {