--- loncom/html/adm/LC_math_editor/src/enode.js	2015/02/24 15:20:44	1.2
+++ loncom/html/adm/LC_math_editor/src/enode.js	2017/01/27 20:31:09	1.3
@@ -627,7 +627,7 @@ ENode.prototype._toMathML = function(con
             mrow2 = document.createElement('mrow');
             for (i=0; i<this.children.length; i++) {
                 if (i > 0)
-                    mrow2.appendChild(this.mo(";"));
+                    mrow2.appendChild(this.mo(Definitions.ARG_SEPARATOR));
                 mrow2.appendChild(this.children[i]._toMathML(context));
             }
             mrow.appendChild(mrow2);