1 files changed, 2 insertions, 0 deletions
diff --git a/ip.h b/ip.h
index 891a89cd2d4d..72c8972680a3 100644
--- a/ip.h
+++ b/ip.h
@@ -36,6 +36,8 @@
 #ifndef TCPDUMP_IP_H
 #define TCPDUMP_IP_H
 
+#include "tcpdump-stdinc.h"
+
 /*
  * Definitions for internet protocol version 4.
  * Per RFC 791, September 1981.