diff --git a/sys/sys/systm.h b/sys/sys/systm.h
--- a/sys/sys/systm.h
+++ b/sys/sys/systm.h
@@ -40,13 +40,13 @@
 #ifndef _SYS_SYSTM_H_
 #define	_SYS_SYSTM_H_
 
-#include <sys/cdefs.h>
-#include <machine/atomic.h>
-#include <machine/cpufunc.h>
+#include <sys/types.h>
 #include <sys/callout.h>
 #include <sys/kassert.h>
 #include <sys/queue.h>
 #include <sys/stdint.h>		/* for people using printf mainly */
+#include <machine/atomic.h>
+#include <machine/cpufunc.h>
 
 __NULLABILITY_PRAGMA_PUSH