diff --git a/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/OperationMonitor.java b/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/OperationMonitor.java
index 9ecffc8..054dd24 100644
--- a/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/OperationMonitor.java
+++ b/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/OperationMonitor.java
@@ -81,7 +81,7 @@ public class OperationMonitor implements Serializable {
 
 	@Override
 	public String toString() {
-		return "ChangeColumnTypeMonitor [progress=" + progress + ", status="
+		return "Monitor [progress=" + progress + ", status="
 				+ status + ", statusDescription=" + statusDescription
 				+ ", error=" + error + ", trId=" + trId + ", columnName="
 				+ columnName + "]";