diff --git a/lib/serialisation/XmlIO.cc b/lib/serialisation/XmlIO.cc
index bb2b9007..e793c2f9 100644
--- a/lib/serialisation/XmlIO.cc
+++ b/lib/serialisation/XmlIO.cc
@@ -74,6 +74,7 @@ void XmlWriter::pushXmlString(const std::string &s)
   {
       node_ = node_.append_copy(child);
   }
+  pop();
 }
 
 void XmlWriter::pop(void)