diff --git a/sys/sys/user.h b/sys/sys/user.h
--- a/sys/sys/user.h
+++ b/sys/sys/user.h
@@ -617,7 +617,8 @@
 	} kvo_type_spec;			/* Type-specific union */
 	uint64_t kvo_me;			/* Uniq handle for anon obj */
 	uint64_t kvo_laundry;			/* Number of laundry pages. */
-	uint64_t _kvo_qspare[5];
+	uint64_t kvo_wired;			/* Number of wired pages. */
+	uint64_t _kvo_qspare[4];
 	uint32_t kvo_swapped;			/* Number of swapped pages */
 	uint32_t kvo_flags;
 	uint32_t _kvo_ispare[6];
diff --git a/sys/vm/vm_object.c b/sys/vm/vm_object.c
--- a/sys/vm/vm_object.c
+++ b/sys/vm/vm_object.c
@@ -2547,6 +2547,9 @@
 					kvo->kvo_inactive++;
 				else if (vm_page_in_laundry(m))
 					kvo->kvo_laundry++;
+
+				if (vm_page_wired(m))
+					kvo->kvo_wired++;
 			}
 		}