diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index c03101e47425528c43217d6727287c76f1ba4c39..083b835d2dd06f39eeb97f5db67c39110b17157e 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -518,7 +518,7 @@ static void xen_set_pud_hyper(pud_t *ptr, pud_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 = pud_val_ma(val);
 	xen_extend_mmu_update(&u);