diff --git a/sys/ia64/ia64/procfs_machdep.c b/sys/ia64/ia64/procfs_machdep.c
index 81b6e3219f0..e771a37e990 100644
--- a/sys/ia64/ia64/procfs_machdep.c
+++ b/sys/ia64/ia64/procfs_machdep.c
@@ -66,6 +66,8 @@
 
 #include <sys/param.h>
 #include <sys/systm.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
 #include <sys/proc.h>
 #include <sys/ptrace.h>
 #include <sys/vnode.h>
@@ -74,7 +76,6 @@
 #include <miscfs/procfs/procfs.h>
 
 #include <vm/vm.h>
-#include <sys/lock.h>
 #include <vm/pmap.h>
 #include <vm/vm_map.h>