diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index eb6d83a458c9cabf5f26e47dc17a8b268328095e..c03101e47425528c43217d6727287c76f1ba4c39 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -233,7 +233,7 @@ static void xen_set_pmd_hyper(pmd_t *ptr, pmd_t val)
 	xen_mc_batch();
 
 	/* ptr may be ioremapped for 64-bit pagetable setup */
-	u.ptr = virt_to_machine(ptr).maddr;
+	u.ptr = arbitrary_virt_to_machine(ptr).maddr;
 	u.val = pmd_val_ma(val);
 	xen_extend_mmu_update(&u);