diff --git a/src/main/java/org/gcube/portlets/user/td/columnwidget/client/ChangeColumnTypePanel.java b/src/main/java/org/gcube/portlets/user/td/columnwidget/client/ChangeColumnTypePanel.java
index 79a0c52..e26184c 100644
--- a/src/main/java/org/gcube/portlets/user/td/columnwidget/client/ChangeColumnTypePanel.java
+++ b/src/main/java/org/gcube/portlets/user/td/columnwidget/client/ChangeColumnTypePanel.java
@@ -865,7 +865,7 @@ public class ChangeColumnTypePanel extends FramedPanel implements
 	}
 
 	protected void updatePeriodType(PeriodDataType periodDataType) {
-	
+
 		ArrayList<ValueDataFormat> valueDataFormats = periodDataType
 				.getTimeDataFormats();
 		comboValueDataFormat.clear();
@@ -983,13 +983,18 @@ public class ChangeColumnTypePanel extends FramedPanel implements
 						.selectedAttributeElement(cd.getDataTypeName()));
 				ColumnDataType columnDataType = ColumnDataType
 						.getColumnDataTypeFromId(cd.getDataTypeName());
-				ArrayList<ValueDataFormat> valueDataFormats = valueDataFormatMap
-						.get(columnDataType);
-				comboValueDataFormat.clear();
-				comboValueDataFormat.reset();
-				comboValueDataFormat.getStore().clear();
-				comboValueDataFormat.getStore().addAll(valueDataFormats);
-				comboValueDataFormat.redraw();
+				if (columnDataType.compareTo(ColumnDataType.Text) == 0) {
+					comboValueDataFormatLabel.setVisible(false);
+				} else {
+					comboValueDataFormatLabel.setVisible(true);
+					ArrayList<ValueDataFormat> valueDataFormats = valueDataFormatMap
+							.get(columnDataType);
+					comboValueDataFormat.clear();
+					comboValueDataFormat.reset();
+					comboValueDataFormat.getStore().clear();
+					comboValueDataFormat.getStore().addAll(valueDataFormats);
+					comboValueDataFormat.redraw();
+				}
 			} else {
 				if (type == ColumnTypeCode.CODENAME) {
 					setLocale(cd.getLocale());