diff --git a/config/locales/en.yml b/config/locales/en.yml
index 09abf6729..7d9f3d087 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -198,7 +198,7 @@ en:
       managing_agent:
         blank: "You must choose a managing agent"
         already_added: "You have already added this managing agent"
-      merged: "Select an organisation that has not been merged"
+      merged: "That organisation has already been merged. Select a different organisation."
     not_answered: "You must answer %{question}"
     invalid_option: "Enter a valid value for %{question}"
     invalid_number: "Enter a number for %{question}"