diff --git a/api/js/etemplate/Et2InputWidget/Et2InputWidget.ts b/api/js/etemplate/Et2InputWidget/Et2InputWidget.ts
index 48385706c6..c3326005c1 100644
--- a/api/js/etemplate/Et2InputWidget/Et2InputWidget.ts
+++ b/api/js/etemplate/Et2InputWidget/Et2InputWidget.ts
@@ -29,6 +29,8 @@ export declare class Et2InputWidgetInterface
 
 	public set_readonly(boolean) : void;
 
+	public set_validation_error(message : string | false) : void;
+
 	public isDirty() : boolean;
 
 	public resetDirty() : void;
diff --git a/api/js/etemplate/etemplate2.ts b/api/js/etemplate/etemplate2.ts
index 8e0893f709..1d940595ef 100644
--- a/api/js/etemplate/etemplate2.ts
+++ b/api/js/etemplate/etemplate2.ts
@@ -1565,7 +1565,10 @@ export class etemplate2
 				{
 					(<et2_tabbox><unknown>tmpWidget).activateTab(widget);
 				}
-
+			}
+			else if(typeof widget.set_validation_error == "function")
+			{
+				widget.set_validation_error(_response.data[id]);
 			}
 		}
 		egw().debug("warn", "Validation errors", _response.data);