diff --git a/sys/vm/device_pager.c b/sys/vm/device_pager.c
index 2080fdf963ad..bce8b125bdb1 100644
--- a/sys/vm/device_pager.c
+++ b/sys/vm/device_pager.c
@@ -169,7 +169,10 @@ cdev_pager_allocate(void *handle, enum obj_type tp, struct cdev_pager_ops *ops,
 			if (pindex > object->size)
 				object->size = pindex;
 			KASSERT(object->type == tp,
-		    ("Inconsistent device pager type %p %d", object, tp));
+			    ("Inconsistent device pager type %p %d",
+			    object, tp));
+			KASSERT(object->un_pager.devp.ops == ops,
+			    ("Inconsistent devops %p %p", object, ops));
 		} else {
 			object = object1;
 			object1 = NULL;