diff --git a/sys/sys/systm.h b/sys/sys/systm.h
index 4fa3e6bb344..1ee9b22b81b 100644
--- a/sys/sys/systm.h
+++ b/sys/sys/systm.h
@@ -38,10 +38,10 @@
 #ifndef _SYS_SYSTM_H_
 #define	_SYS_SYSTM_H_
 
+#include <sys/cdefs.h>
 #include <machine/atomic.h>
 #include <machine/cpufunc.h>
 #include <sys/callout.h>
-#include <sys/cdefs.h>
 #include <sys/queue.h>
 #include <sys/stdint.h>		/* for people using printf mainly */