diff --git a/src/mathed/InsetMathMBox.cpp b/src/mathed/InsetMathMBox.cpp
index 0210bc4b80..bf27b8d102 100644
--- a/src/mathed/InsetMathMBox.cpp
+++ b/src/mathed/InsetMathMBox.cpp
@@ -120,7 +120,13 @@ void InsetMathMBox::cursorPos(BufferView const & bv,
 
 void InsetMathMBox::mathmlize(MathStream & ms) const
 {	
-	SetMode textmode(ms, true, from_ascii("class='mbox'"));
+	SetMode textmode(ms, true, "class='mbox'");
+	ms << cell(0);
+}
+
+void InsetMathMBox::htmlize(HtmlStream & ms) const
+{	
+	SetHTMLMode textmode(ms, true, "class='mbox'");
 	ms << cell(0);
 }
 
diff --git a/src/mathed/InsetMathMBox.h b/src/mathed/InsetMathMBox.h
index 1e5654e940..eca4fcbfaa 100644
--- a/src/mathed/InsetMathMBox.h
+++ b/src/mathed/InsetMathMBox.h
@@ -50,6 +50,8 @@ public:
 	///
 	void mathmlize(MathStream &) const;
 	///
+	void htmlize(HtmlStream &) const;
+	///
 	Text * getText(int) const;
 	///
 	void cursorPos(BufferView const & bv, CursorSlice const & sl,