diff --git a/src/mathed/InsetMathDelim.cpp b/src/mathed/InsetMathDelim.cpp
index 95a0883cce..e97e12c04e 100644
--- a/src/mathed/InsetMathDelim.cpp
+++ b/src/mathed/InsetMathDelim.cpp
@@ -181,7 +181,8 @@ void InsetMathDelim::mathematica(MathematicaStream & os) const
 
 void InsetMathDelim::mathmlize(MathMLStream & ms) const
 {
-	ms << "<" << from_ascii(ms.namespacedTag("mo")) << " form='prefix' fence='true' stretchy='true' symmetric='true'>"
+	ms << "<" << from_ascii(ms.namespacedTag("mrow")) << ">" << "\n"
+	   << "<" << from_ascii(ms.namespacedTag("mo")) << " form='prefix' fence='true' stretchy='true' symmetric='true'>"
 	   << convertDelimToXMLEscape(left_, ms.xmlMode())
 	   << "</" << from_ascii(ms.namespacedTag("mo")) << ">"
 	   << "\n"
@@ -189,8 +190,8 @@ void InsetMathDelim::mathmlize(MathMLStream & ms) const
 	   << "\n"
 	   << "<" << from_ascii(ms.namespacedTag("mo")) << " form='postfix' fence='true' stretchy='true' symmetric='true'>"
 	   << convertDelimToXMLEscape(right_, ms.xmlMode())
-	   << "</" << from_ascii(ms.namespacedTag("mo")) << ">"
-	   << "\n";
+	   << "</" << from_ascii(ms.namespacedTag("mo")) << ">" << "\n"
+	   << "</" << from_ascii(ms.namespacedTag("mrow")) << ">" << "\n";
 }