diff --git a/arch/i386/mm/fault.c b/arch/i386/mm/fault.c
index 01ffdd4..fcb38e7 100644
--- a/arch/i386/mm/fault.c
+++ b/arch/i386/mm/fault.c
@@ -249,9 +249,10 @@
 	pmd_k = pmd_offset(pud_k, address);
 	if (!pmd_present(*pmd_k))
 		return NULL;
-	if (!pmd_present(*pmd))
+	if (!pmd_present(*pmd)) {
 		set_pmd(pmd, *pmd_k);
-	else
+		arch_flush_lazy_mmu_mode();
+	} else
 		BUG_ON(pmd_page(*pmd) != pmd_page(*pmd_k));
 	return pmd_k;
 }