diff --git a/sys/i386/i386/critical.c b/sys/i386/i386/critical.c
index 325d97a2bbf1..77965d413987 100644
--- a/sys/i386/i386/critical.c
+++ b/sys/i386/i386/critical.c
@@ -31,7 +31,9 @@ __FBSDID("$FreeBSD$");
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/proc.h>
+
 #include <machine/critical.h>
+#include <machine/psl.h>
 
 /*
  * cpu_critical_fork_exit() - cleanup after fork