diff --git a/src/java/org/apache/poi/ss/formula/functions/Npv.java b/src/java/org/apache/poi/ss/formula/functions/Npv.java
index 8ca7f8555..4609094ff 100644
--- a/src/java/org/apache/poi/ss/formula/functions/Npv.java
+++ b/src/java/org/apache/poi/ss/formula/functions/Npv.java
@@ -46,7 +46,8 @@ public final class Npv implements Function {
         try {
 			double rate = NumericFunction.singleOperandEvaluate(args[0], srcRowIndex, srcColumnIndex);
             // convert tail arguments into an array of doubles
-            ValueEval[] vargs = Arrays.copyOfRange(args, 1 , args.length);
+            ValueEval[] vargs = new ValueEval[args.length-1];
+            System.arraycopy(args, 1, vargs, 0, vargs.length);
             double[] values = AggregateFunction.ValueCollector.collectValues(vargs);
 
             double result = FinanceLib.npv(rate, values);
diff --git a/src/ooxml/testcases/org/apache/poi/xssf/usermodel/TestXSSFRichTextString.java b/src/ooxml/testcases/org/apache/poi/xssf/usermodel/TestXSSFRichTextString.java
index e76966341..0b925fc95 100644
--- a/src/ooxml/testcases/org/apache/poi/xssf/usermodel/TestXSSFRichTextString.java
+++ b/src/ooxml/testcases/org/apache/poi/xssf/usermodel/TestXSSFRichTextString.java
@@ -160,8 +160,8 @@ public final class TestXSSFRichTextString extends TestCase {
 
         TreeMap<Integer, CTRPrElt> formats = str.getFormatMap(st);
         assertEquals(1, formats.size());
-        assertEquals(26, (int)formats.firstEntry().getKey());
-        assertNull(formats.firstEntry().getValue());
+        assertEquals(26, (int)formats.firstKey());
+        assertNull(formats.get( formats.firstKey() ));
 
         CTRPrElt fmt1 = CTRPrElt.Factory.newInstance();
         str.applyFont(formats, 0, 6, fmt1);