diff --git a/src/param/param-definition.ts b/src/param/param-definition.ts
index 3f25cc35016cbe1a49cea013d6d10f4bde170404..7c45e3621a0e4ad09afc99b69ad62045bf584c9e 100644
--- a/src/param/param-definition.ts
+++ b/src/param/param-definition.ts
@@ -834,7 +834,7 @@ export class ParamDefinition implements INamedIterableValues, IObservable {
                     } catch (err) {
                         ret.hasErrors = true;
                         console.error("loadObjectRepresentation: defineReference error"
-                            + ` ${this.symbol} => ${destNub.uid}.${obj.targetParam})`);
+                            + ` (${this.symbol} => ${destNub.uid}.${obj.targetParam})`);
                     }
                 } // si la cible du lien n'existe pas, Session.fixLinks() est censé s'en occuper
                 break;