diff --git a/sw/source/filter/ww8/ww8par3.cxx b/sw/source/filter/ww8/ww8par3.cxx
index f6bed3cd8d89..a2c729083e22 100644
--- a/sw/source/filter/ww8/ww8par3.cxx
+++ b/sw/source/filter/ww8/ww8par3.cxx
@@ -2183,7 +2183,7 @@ void WW8FormulaControl::FormulaRead(SwWw8ControlType nWhich,
         {
             if ( iRes != 25 )
                 nChecked = iRes;
-            sDefault = ( wDef == 0 ) ? "0" : "1";
+            sDefault = ( wDef == 0 ) ? rtl::OUString( RTL_CONSTASCII_USTRINGPARAM("0") ) :  rtl::OUString( RTL_CONSTASCII_USTRINGPARAM("1") );
         }
     }
     // xstzTextFormat