diff --git a/src/java/org/apache/poi/ss/formula/functions/MathX.java b/src/java/org/apache/poi/ss/formula/functions/MathX.java
index 710e6110817..b37d82a1025 100644
--- a/src/java/org/apache/poi/ss/formula/functions/MathX.java
+++ b/src/java/org/apache/poi/ss/formula/functions/MathX.java
@@ -82,7 +82,7 @@ public static double roundUp(double n, int p) {
             retval = Double.NaN;
         }
         else {
-            retval = java.math.BigDecimal.valueOf(n).setScale(p, java.math.RoundingMode.UP).doubleValue();
+            retval = new java.math.BigDecimal(NumberToTextConverter.toText(n)).setScale(p, java.math.RoundingMode.UP).doubleValue();
         }
 
         return retval;
@@ -110,7 +110,7 @@ public static double roundDown(double n, int p) {
             retval = Double.NaN;
         }
         else {
-            retval = java.math.BigDecimal.valueOf(n).setScale(p, java.math.RoundingMode.DOWN).doubleValue();
+            retval = new java.math.BigDecimal(NumberToTextConverter.toText(n)).setScale(p, java.math.RoundingMode.DOWN).doubleValue();
         }
 
         return retval;