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
@@ -7479,8 +7479,6 @@
 	pt_entry_t PG_G, PG_RW, PG_V;
 	vm_page_t mt, pdpg;
 
-	KASSERT(pmap == kernel_pmap || (newpde & PG_W) == 0,
-	    ("pmap_enter_pde: cannot create wired user mapping"));
 	PG_G = pmap_global_bit(pmap);
 	PG_RW = pmap_rw_bit(pmap);
 	KASSERT((newpde & (pmap_modified_bit(pmap) | PG_RW)) != PG_RW,
@@ -7594,6 +7592,27 @@
 		}
 	}
 
+	/*
+	 * Allocate leaf ptpage for wired userspace pages.
+	 */
+	if (pmap != kernel_pmap && (newpde & PG_W) != 0) {
+		vm_page_t uwptpg;
+		vm_paddr_t uwptpgpa;
+
+		uwptpg = pmap_alloc_pt_page(pmap, pmap_pde_index(va),
+		    VM_ALLOC_WIRED);
+		if (uwptpg == NULL ||
+		    pmap_insert_pt_page(pmap, uwptpg, true, true)) {
+			return (KERN_RESOURCE_SHORTAGE);
+		}
+
+		uwptpgpa = VM_PAGE_TO_PHYS(uwptpg);
+		pmap_fill_ptp((pt_entry_t *)PHYS_TO_DMAP(uwptpgpa),
+		    newpde & ~(PG_PS));
+
+		uwptpg->ref_count = NPTEPG;
+	}
+
 	/*
 	 * Increment counters.
 	 */
diff --git a/sys/vm/vm_fault.c b/sys/vm/vm_fault.c
--- a/sys/vm/vm_fault.c
+++ b/sys/vm/vm_fault.c
@@ -388,7 +388,7 @@
 	    rounddown2(vaddr, pagesizes[m_super->psind]) >= fs->entry->start &&
 	    roundup2(vaddr + 1, pagesizes[m_super->psind]) <= fs->entry->end &&
 	    (vaddr & (pagesizes[m_super->psind] - 1)) == (VM_PAGE_TO_PHYS(m) &
-	    (pagesizes[m_super->psind] - 1)) && !fs->wired &&
+	    (pagesizes[m_super->psind] - 1)) &&
 	    pmap_ps_enabled(fs->map->pmap)) {
 		flags = PS_ALL_VALID;
 		if ((fs->prot & VM_PROT_WRITE) != 0) {
@@ -622,7 +622,7 @@
 		psind = m->psind;
 		if (psind > 0 && ((vaddr & (pagesizes[psind] - 1)) != 0 ||
 		    pidx + OFF_TO_IDX(pagesizes[psind]) - 1 > pager_last ||
-		    !pmap_ps_enabled(fs->map->pmap) || fs->wired))
+		    !pmap_ps_enabled(fs->map->pmap)))
 			psind = 0;
 
 		npages = atop(pagesizes[psind]);