diff --git a/src/app/components/generic-input/generic-input.component.ts b/src/app/components/generic-input/generic-input.component.ts
index 0b8b3f09bcd90f653c1cfb983d1146c6f728e019..e75f2ed188380b1ffebd83a96705e1fc6afd6a56 100644
--- a/src/app/components/generic-input/generic-input.component.ts
+++ b/src/app/components/generic-input/generic-input.component.ts
@@ -1,7 +1,7 @@
 import { Input, Output, EventEmitter, ChangeDetectorRef, OnChanges, ViewChild } from "@angular/core";
 import { NgModel } from "@angular/forms";
 import { BaseComponent } from "../base/base.component";
-import { isNumeric } from "jalhyd";
+import { isNumeric, Structure } from "jalhyd";
 import { FormulaireDefinition } from "../../formulaire/definition/form-definition";
 import { NgParameter } from "../../formulaire/ngparam";
 import { I18nService } from "../../services/internationalisation/internationalisation.service";
@@ -37,11 +37,18 @@ export abstract class GenericInputComponent extends BaseComponent implements OnC
      * id de l'input, utilisé notamment pour les tests
      */
     public get inputId() {
-        let id = "input-1";
+        let id = "error-in-inputId";
         if (this._model) {
             // unique input id based on parameter symbol
             if (this._model instanceof NgParameter) {
-                id = (this._model as NgParameter).symbol;
+                const param = this._model as NgParameter;
+                id = param.symbol;
+                // if inside a nested Structure, prefix with Structure position
+                // to disambiguate
+                const nub = param.paramDefinition.parentNub;
+                if (nub && nub instanceof Structure) {
+                    id = nub.findPositionInParent() + "_" + id;
+                }
             }
         }
         return id;