diff --git a/sys/netinet/ip_encap.c b/sys/netinet/ip_encap.c
index bcae4691247e..ebcce2958a32 100644
--- a/sys/netinet/ip_encap.c
+++ b/sys/netinet/ip_encap.c
@@ -66,6 +66,7 @@ __FBSDID("$FreeBSD$");
 
 #include <sys/param.h>
 #include <sys/systm.h>
+#include <sys/eventhandler.h>
 #include <sys/kernel.h>
 #include <sys/lock.h>
 #include <sys/malloc.h>