diff --git a/data/org.eclipse.birt.data.aggregation/src/org/eclipse/birt/data/aggregation/impl/TotalMedian.java b/data/org.eclipse.birt.data.aggregation/src/org/eclipse/birt/data/aggregation/impl/TotalMedian.java
index 7e0bca5d37a..fedf3368523 100644
--- a/data/org.eclipse.birt.data.aggregation/src/org/eclipse/birt/data/aggregation/impl/TotalMedian.java
+++ b/data/org.eclipse.birt.data.aggregation/src/org/eclipse/birt/data/aggregation/impl/TotalMedian.java
@@ -58,7 +58,7 @@ public int getType()
      */
 	public int getDataType( )
 	{
-		return DataType.ANY_TYPE;
+		return DataType.DOUBLE_TYPE;
 	}
 
     /*