jaxp/src/com/sun/org/apache/xalan/internal/xsltc/runtime/BasisLibrary.java

@@ -953,10 +953,13 @@
         }
         else {
             if (Double.isNaN(d) || Double.isInfinite(d))
                 return(Double.toString(d));
 
+            //Convert -0.0 to +0.0 other values remains the same
+            d = d + 0.0;
+
             // Use the XPath formatter to ignore locales
             StringBuffer result = threadLocalStringBuffer.get();
             result.setLength(0);
             xpathFormatter.format(d, result, _fieldPosition);
             return result.toString();