diff --git a/sys/fs/unionfs/union_subr.c b/sys/fs/unionfs/union_subr.c
index 3ac98bf508bb..ce38e2d3fc3a 100644
--- a/sys/fs/unionfs/union_subr.c
+++ b/sys/fs/unionfs/union_subr.c
@@ -45,10 +45,10 @@
 #include <sys/filedesc.h>
 #include <sys/kernel.h>
 #include <sys/lock.h>
-#include <sys/mutex.h>
 #include <sys/malloc.h>
 #include <sys/module.h>
 #include <sys/mount.h>
+#include <sys/mutex.h>
 #include <sys/namei.h>
 #include <sys/stat.h>
 #include <sys/vnode.h>
diff --git a/sys/miscfs/union/union_subr.c b/sys/miscfs/union/union_subr.c
index 3ac98bf508bb..ce38e2d3fc3a 100644
--- a/sys/miscfs/union/union_subr.c
+++ b/sys/miscfs/union/union_subr.c
@@ -45,10 +45,10 @@
 #include <sys/filedesc.h>
 #include <sys/kernel.h>
 #include <sys/lock.h>
-#include <sys/mutex.h>
 #include <sys/malloc.h>
 #include <sys/module.h>
 #include <sys/mount.h>
+#include <sys/mutex.h>
 #include <sys/namei.h>
 #include <sys/stat.h>
 #include <sys/vnode.h>