diff --git a/sys/netinet/ip_input.c b/sys/netinet/ip_input.c
index 6cf40de7ab1f..68d7594dedce 100644
--- a/sys/netinet/ip_input.c
+++ b/sys/netinet/ip_input.c
@@ -41,6 +41,7 @@
 #include "opt_ipdn.h"
 #include "opt_ipdivert.h"
 #include "opt_ipfilter.h"
+#include "opt_ipstealth.h"
 
 #include <stddef.h>