diff --git a/src/remous.ts b/src/remous.ts
index 867f3cbf18dab2f062e923a10e63f12ad2c4a817..d06721cbc960768c062c5ade36ed3506809f30aa 100644
--- a/src/remous.ts
+++ b/src/remous.ts
@@ -59,6 +59,7 @@ export class CourbeRemousParams extends ParamsEquation {
         this.addParamDefinition(this._Dx);
 
         this.DefineCalculability(); // Pour ne pas remettre en undefined les prms de _section
+        this.Pr.visible = true; // exception
     }
 
     public addParamDefinition(p: ParamDefinition) {