diff --git a/sys/fs/tmpfs/tmpfs_vnops.c b/sys/fs/tmpfs/tmpfs_vnops.c
--- a/sys/fs/tmpfs/tmpfs_vnops.c
+++ b/sys/fs/tmpfs/tmpfs_vnops.c
@@ -491,7 +491,6 @@
 {
 	struct vnode *vp = v->a_vp;
 	struct vattr *vap = v->a_vap;
-	vm_object_t obj;
 	struct tmpfs_node *node;
 
 	node = VP_TO_TMPFS_NODE(vp);
@@ -516,10 +515,15 @@
 	vap->va_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ?
 	    node->tn_rdev : NODEV;
 	if (vp->v_type == VREG) {
-		obj = node->tn_reg.tn_aobj;
+#ifdef __ILP32__
+		vm_object_t obj = node->tn_reg.tn_aobj;
+
 		VM_OBJECT_RLOCK(obj);
+#endif
 		vap->va_bytes = ptoa(node->tn_reg.tn_pages);
+#ifdef __ILP32__
 		VM_OBJECT_RUNLOCK(obj);
+#endif
 	} else {
 		vap->va_bytes = node->tn_size;
 	}