diff --git a/oox/source/export/chartexport.cxx b/oox/source/export/chartexport.cxx
index 621a1d0149e6..c42f49661405 100644
--- a/oox/source/export/chartexport.cxx
+++ b/oox/source/export/chartexport.cxx
@@ -278,7 +278,7 @@ Reference< chart2::data::XDataSource > lcl_pressUsedDataIntoRectangularFormat( c
         aLabeledSeqVector.push_back( xXValues );
 
     //add all other sequences now without x-values
-    lcl_MatchesRole aHasXValues( OUString("values-x") );
+    lcl_MatchesRole aHasXValues( "values-x" );
     for( sal_Int32 nN=0; nN<aSeriesSeqVector.getLength(); nN++ )
     {
         if( !aHasXValues( aSeriesSeqVector[nN] ) )