diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c
--- a/sys/amd64/amd64/pmap.c
+++ b/sys/amd64/amd64/pmap.c
@@ -7537,20 +7537,25 @@
 	 * resident, we are creating it here.
 	 */
 	if (va < VM_MAXUSER_ADDRESS) {
+		pdp_entry_t *pdpe;
+		pd_entry_t *pde;
 		vm_pindex_t ptepindex;
-		pd_entry_t *ptepa;
 
 		/*
 		 * Calculate pagetable page index
 		 */
 		ptepindex = pmap_pde_pindex(va);
-		if (mpte && (mpte->pindex == ptepindex)) {
+		if (mpte != NULL && (mpte->pindex == ptepindex)) {
 			mpte->ref_count++;
 		} else {
-			/*
-			 * Get the page directory entry
-			 */
-			ptepa = pmap_pde(pmap, va);
+			pdpe = pmap_pdpe(pmap, va);
+			if (pdpe != NULL && (*pdpe & PG_V) != 0) {
+				if ((*pdpe & PG_PS) != 0)
+					return (NULL);
+				pde = pmap_pdpe_to_pde(pdpe, va);
+			} else {
+				pde = NULL;
+			}
 
 			/*
 			 * If the page table page is mapped, we just increment
@@ -7558,10 +7563,10 @@
 			 * attempt to allocate a page table page.  If this
 			 * attempt fails, we don't retry.  Instead, we give up.
 			 */
-			if (ptepa && (*ptepa & PG_V) != 0) {
-				if (*ptepa & PG_PS)
+			if (pde != NULL && (*pde & PG_V) != 0) {
+				if (*pde & PG_PS)
 					return (NULL);
-				mpte = PHYS_TO_VM_PAGE(*ptepa & PG_FRAME);
+				mpte = PHYS_TO_VM_PAGE(*pde & PG_FRAME);
 				mpte->ref_count++;
 			} else {
 				/*