1 files changed, 2 insertions, 0 deletions
diff --git a/src/dns.h b/src/dns.h
index 009f861..2d5ccdf 100644
--- a/src/dns.h
+++ b/src/dns.h
@@ -71,6 +71,8 @@ enum dns_responsecode {
 	REFUSED	= 5
 };
 
+#define DNS_HEADER_LEN 12
+
 #define FLIP_BYTES(u)	(((0x00FF & u) << 8) | ((0xFF00 & u) >> 8))
 
 /**