diff --git a/sax/source/tools/converter.cxx b/sax/source/tools/converter.cxx
index dc21f057e38c..32e1ceb79335 100644
--- a/sax/source/tools/converter.cxx
+++ b/sax/source/tools/converter.cxx
@@ -820,7 +820,7 @@ bool Converter::convertDuration(double& rfTime,
                 }
                 else
                 {
-                    sDoubleStr += OUString(c);
+                    sDoubleStr += OUStringLiteral1(c);
                 }
             }
         }