diff --git a/src/mathed/InsetMathCases.cpp b/src/mathed/InsetMathCases.cpp
index 5e1ee21fdb..9b55c51ea9 100644
--- a/src/mathed/InsetMathCases.cpp
+++ b/src/mathed/InsetMathCases.cpp
@@ -143,6 +143,13 @@ void InsetMathCases::maple(MapleStream & os) const
 }
 
 
+void InsetMathCases::mathmlize(MathStream & ms) const
+{
+	ms << "<mo form='prefix' fence='true' stretchy='true' symmetric='true'>{</mo>";
+	InsetMathGrid::mathmlize(ms);
+}
+
+
 void InsetMathCases::infoize(odocstream & os) const
 {
 	os << "Cases ";
diff --git a/src/mathed/InsetMathCases.h b/src/mathed/InsetMathCases.h
index d5abb1eea6..5839cef277 100644
--- a/src/mathed/InsetMathCases.h
+++ b/src/mathed/InsetMathCases.h
@@ -43,6 +43,8 @@ public:
 	///
 	void maple(MapleStream &) const;
 	///
+	void mathmlize(MathStream &) const;
+	///
 	void write(WriteStream & os) const;
 	///
 	void validate(LaTeXFeatures & features) const;