diff --git a/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/DynamicPropertiesSection.qml b/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/DynamicPropertiesSection.qml
index 773f08f6bb2..4bd99e3f68e 100644
--- a/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/DynamicPropertiesSection.qml
+++ b/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/DynamicPropertiesSection.qml
@@ -677,6 +677,7 @@ Section {
                         translationIndicatorVisible: false
                         width: cePopup.itemWidth
                         rightPadding: 8
+                        validator: RegExpValidator { regExp: /[a-z]+[0-9A-Za-z]*/ }
                     }
                 }
                 RowLayout {