1 files changed, 2 insertions, 0 deletions
diff --git a/lib/ipv4.h b/lib/ipv4.h
index 87e0874..5cb2835 100644
--- a/lib/ipv4.h
+++ b/lib/ipv4.h
@@ -77,4 +77,6 @@ static inline int ipv4_compare(u32 x, u32 y)
   return (x > y) - (x < y);
 }
 
+#define IP_PREC_INTERNET_CONTROL 0xc0
+
 #endif