diff --git a/src/context/providers/NonCollinearMagnetizationContextProvider.js b/src/context/providers/NonCollinearMagnetizationContextProvider.js
index 710fec3..913243e 100644
--- a/src/context/providers/NonCollinearMagnetizationContextProvider.js
+++ b/src/context/providers/NonCollinearMagnetizationContextProvider.js
@@ -77,7 +77,7 @@ export class NonCollinearMagnetizationContextProvider extends mix(JSONSchemaForm
             },
             isConstrainedMagnetization: {},
             constrainedMagnetization: {
-                items: {
+                properties: {
                     "ui:classNames": "col-xs-3",
                 },
                 "ui:readonly": !this.isConstrainedMagnetization,