diff --git a/app/models/dossier.rb b/app/models/dossier.rb
index a7c237bbc..bc03925bc 100644
--- a/app/models/dossier.rb
+++ b/app/models/dossier.rb
@@ -216,6 +216,7 @@ class Dossier < ApplicationRecord
 
   validates :user, presence: true
   validates :individual, presence: true, if: -> { procedure.for_individual? }
+  validates :groupe_instructeur, presence: true
 
   def update_search_terms
     self.search_terms = [