diff --git a/include/types/connection.h b/include/types/connection.h
index 2d10704c1..beb9b898e 100644
--- a/include/types/connection.h
+++ b/include/types/connection.h
@@ -32,6 +32,7 @@
 #include <types/port_range.h>
 #include <types/protocol.h>
 
+#include <netinet/in_systm.h>
 #include <netinet/ip.h>
 #include <netinet/ip6.h>