diff --git a/sys/security/mac/mac_framework.c b/sys/security/mac/mac_framework.c
index 94a593e62f3..2b45bab2771 100644
--- a/sys/security/mac/mac_framework.c
+++ b/sys/security/mac/mac_framework.c
@@ -62,6 +62,8 @@
  * src/sys/security/mac_*.
  */
 
+#include "opt_mac.h"
+
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");