diff --git a/src/mathed/InsetMathOverset.cpp b/src/mathed/InsetMathOverset.cpp
index 6b4ed6789d..abd6890788 100644
--- a/src/mathed/InsetMathOverset.cpp
+++ b/src/mathed/InsetMathOverset.cpp
@@ -84,6 +84,12 @@ void InsetMathOverset::normalize(NormalStream & os) const
 }
 
 
+void InsetMathOverset::mathmlize(MathStream & ms) const
+{
+	ms << "<mover accent='false'>" << cell(0) << cell(1) << "</mover>";
+}
+
+
 void InsetMathOverset::validate(LaTeXFeatures & features) const
 {
 	features.require("amsmath");
diff --git a/src/mathed/InsetMathOverset.h b/src/mathed/InsetMathOverset.h
index edcdd020e2..5fdeb32e04 100644
--- a/src/mathed/InsetMathOverset.h
+++ b/src/mathed/InsetMathOverset.h
@@ -36,6 +36,8 @@ public:
 	///
 	void normalize(NormalStream &) const;
 	///
+	void mathmlize(MathStream &) const;
+	///
 	void validate(LaTeXFeatures & features) const;
 	///
 	InsetCode lyxCode() const { return MATH_OVERSET_CODE; }