diff --git a/src/main/java/org/gcube/portlets/user/td/gwtservice/server/TDGWTServiceImpl.java b/src/main/java/org/gcube/portlets/user/td/gwtservice/server/TDGWTServiceImpl.java
index 44c61e1..c360a26 100644
--- a/src/main/java/org/gcube/portlets/user/td/gwtservice/server/TDGWTServiceImpl.java
+++ b/src/main/java/org/gcube/portlets/user/td/gwtservice/server/TDGWTServiceImpl.java
@@ -2308,9 +2308,7 @@ public class TDGWTServiceImpl extends RemoteServiceServlet implements
 			operationDefinition = getOperationDescriptorWithId(
 					OperationsId.ChangeToMeasureColumn.toString(), capabilities);
 
-			map.put(Constants.PARAMETER_DATA_TYPE, ColumnDataTypeMap
-					.map(changeColumnTypeSession.getColumnDataType()));
-			map.put(Constants.PARAMETER_DATA_TYPE_TARGET, ColumnDataTypeMap
+			map.put(Constants.PARAMETER_TARGET_DATA_TYPE, ColumnDataTypeMap
 					.map(changeColumnTypeSession.getColumnDataTypeTarget()));
 			invocation = new OperationExecution(changeColumnTypeSession
 					.getColumnData().getColumnId(),
@@ -2322,7 +2320,7 @@ public class TDGWTServiceImpl extends RemoteServiceServlet implements
 						OperationsId.ChangeToAttributeColumn.toString(),
 						capabilities);
 
-				map.put(Constants.PARAMETER_DATA_TYPE_TARGET, ColumnDataTypeMap
+				map.put(Constants.PARAMETER_TARGET_DATA_TYPE, ColumnDataTypeMap
 						.map(changeColumnTypeSession.getColumnDataTypeTarget()));
 				invocation = new OperationExecution(changeColumnTypeSession
 						.getColumnData().getColumnId(),
diff --git a/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/Constants.java b/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/Constants.java
index 0d5bfaa..b95a727 100644
--- a/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/Constants.java
+++ b/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/Constants.java
@@ -28,7 +28,7 @@ public class Constants {
 	public static final String PARAMETER_VERSION ="version";
 	
 	public static final String PARAMETER_DATA_TYPE="dataType";
-	public static final String PARAMETER_DATA_TYPE_TARGET="dataTypeTarget";
+	public static final String PARAMETER_TARGET_DATA_TYPE="targetDataType";