diff --git a/src/cairo-rtree-private.h b/src/cairo-rtree-private.h
index 14576886d..191c85871 100644
--- a/src/cairo-rtree-private.h
+++ b/src/cairo-rtree-private.h
@@ -116,7 +116,7 @@ _cairo_rtree_pin (cairo_rtree_t *rtree, cairo_rtree_node_t *node)
 {
     if (! node->pinned) {
 	cairo_list_move (&node->link, &rtree->pinned);
-	node->pinned = 0;
+	node->pinned = 1;
     }
 
     return node;