diff --git a/mistral/services/actions.py b/mistral/services/actions.py
index 37d78774..e9f1574d 100644
--- a/mistral/services/actions.py
+++ b/mistral/services/actions.py
@@ -36,8 +36,9 @@ def update_actions(definition, scope='private', identifier=None):
 
     if identifier and len(actions) > 1:
         raise exc.InputException(
-            "More than one actions are not supported for update with UUID "
-            "provided."
+            "More than one actions are not supported for "
+            "update with identifier. [identifier: %s]" %
+            identifier
         )
 
     db_actions = []
diff --git a/mistral/services/workflows.py b/mistral/services/workflows.py
index 25e375b3..649edc1c 100644
--- a/mistral/services/workflows.py
+++ b/mistral/services/workflows.py
@@ -86,8 +86,9 @@ def update_workflows(definition, scope='private', identifier=None):
 
     if identifier and len(wfs) > 1:
         raise exc.InputException(
-            "More than one workflows are not supported for update with UUID "
-            "provided."
+            "More than one workflows are not supported for "
+            "update with identifier. [identifier: %s]" %
+            identifier
         )
 
     db_wfs = []