diff --git a/sys/alpha/linux/linux_genassym.c b/sys/alpha/linux/linux_genassym.c
index b9a31ef7314..25e20af9c79 100644
--- a/sys/alpha/linux/linux_genassym.c
+++ b/sys/alpha/linux/linux_genassym.c
@@ -1,7 +1,9 @@
 /* $FreeBSD$ */
 
-#include <sys/assym.h>
+#include <stddef.h>
+
 #include <sys/param.h>
+#include <sys/assym.h>
 
 #include <i386/linux/linux.h>
 
diff --git a/sys/i386/linux/linux_genassym.c b/sys/i386/linux/linux_genassym.c
index b9a31ef7314..25e20af9c79 100644
--- a/sys/i386/linux/linux_genassym.c
+++ b/sys/i386/linux/linux_genassym.c
@@ -1,7 +1,9 @@
 /* $FreeBSD$ */
 
-#include <sys/assym.h>
+#include <stddef.h>
+
 #include <sys/param.h>
+#include <sys/assym.h>
 
 #include <i386/linux/linux.h>