diff --git a/app/models/dossier.rb b/app/models/dossier.rb
index 1411b5df7..adb1de4fd 100644
--- a/app/models/dossier.rb
+++ b/app/models/dossier.rb
@@ -729,7 +729,7 @@ class Dossier < ApplicationRecord
       self.en_construction_at = Time.zone.now
     elsif en_instruction? && !self.en_instruction_at
       self.en_instruction_at = Time.zone.now
-    elsif TERMINE.include?(state)
+    elsif TERMINE.include?(state) && !self.processed_at
       self.processed_at = Time.zone.now
     end
   end