diff --git a/IPython/html/static/notebook/js/notebook.js b/IPython/html/static/notebook/js/notebook.js
index 3249fb308..b706e1779 100644
--- a/IPython/html/static/notebook/js/notebook.js
+++ b/IPython/html/static/notebook/js/notebook.js
@@ -1065,7 +1065,7 @@ var IPython = (function (IPython) {
                 cell.set_text(textb);
                 var new_cell = this.insert_cell_above('code');
                 new_cell.set_text(texta);
-            } else if (((cell instanceof mdc) || (cell instanceof rc)) && !cell.rendered) {
+            } else if ((cell instanceof mdc && !cell.rendered) || (cell instanceof rc)) {
                 // We know cell is !rendered so we can use set_text.
                 cell.set_text(textb);
                 var new_cell = this.insert_cell_above(cell.cell_type);