diff --git a/app/models/procedure_revision.rb b/app/models/procedure_revision.rb
index 2b1669a0e6d..f7e55bd34d1 100644
--- a/app/models/procedure_revision.rb
+++ b/app/models/procedure_revision.rb
@@ -41,7 +41,7 @@ def add_type_de_champ(params)
     after_stable_id = params.delete(:after_stable_id)
     after_coordinate, _ = coordinate_and_tdc(after_stable_id)
 
-    siblings = siblings_for(parent_coordinate:, private_tdc: params[:private] || params['private'])
+    siblings = siblings_for(parent_coordinate:, private_tdc: params[:private])
 
     tdc = TypeDeChamp.new(params)
     if tdc.save