diff --git a/common/src/main/java/com/genexus/xml/GXXMLSerializable.java b/common/src/main/java/com/genexus/xml/GXXMLSerializable.java
index d4a72cf1a..e74b86948 100644
--- a/common/src/main/java/com/genexus/xml/GXXMLSerializable.java
+++ b/common/src/main/java/com/genexus/xml/GXXMLSerializable.java
@@ -479,7 +479,10 @@ private void collectionFromJSONArray(JSONArray jsonArray, GXSimpleCollection gxC
                     }
                     else
                     {
-                        gxColl.addBase(currObj);
+						if (gxColl.getElementsType() == java.math.BigDecimal.class)
+							gxColl.addBase(DecimalUtil.stringToDec(jsonArray.getString(i)));
+						else
+                        	gxColl.addBase(currObj);
                     }
                 }
             }