diff --git a/product/ERP5Type/interfaces/component.py b/product/ERP5Type/interfaces/component.py
index 14c521cb709d4d9a4f18d9c14ecc6c816d4c4c6b..c067f9eba8dad48d0d4e7315b4064bded3878a26 100644
--- a/product/ERP5Type/interfaces/component.py
+++ b/product/ERP5Type/interfaces/component.py
@@ -48,6 +48,11 @@ class IComponent(Interface):
     then if no error is returned, validate it
     """
 
+  def hasErrorMessageList(obj):
+    """
+    Check whether there are error messages
+    """
+
   def getErrorMessageList(obj):
     """
     Return errors, if any, which may have arised when the Component has been