diff --git a/lib/ui/semantics.dart b/lib/ui/semantics.dart
index ef2a77d440f02..7323f64a9ea0a 100644
--- a/lib/ui/semantics.dart
+++ b/lib/ui/semantics.dart
@@ -1146,7 +1146,7 @@ abstract class SemanticsUpdateBuilderNew {
     required double elevation,
     required double thickness,
     required Rect rect,
-    String identifier,
+    required String identifier,
     required String label,
     required List<StringAttribute> labelAttributes,
     required String value,
@@ -1216,7 +1216,7 @@ base class _NativeSemanticsUpdateBuilderNew extends NativeFieldWrapperClass1 imp
     required double elevation,
     required double thickness,
     required Rect rect,
-    String? identifier,
+    required String identifier,
     required String label,
     required List<StringAttribute> labelAttributes,
     required String value,
@@ -1255,7 +1255,7 @@ base class _NativeSemanticsUpdateBuilderNew extends NativeFieldWrapperClass1 imp
       rect.bottom,
       elevation,
       thickness,
-      identifier ?? '',
+      identifier,
       label,
       labelAttributes,
       value,
@@ -1333,7 +1333,7 @@ base class _NativeSemanticsUpdateBuilderNew extends NativeFieldWrapperClass1 imp
       double bottom,
       double elevation,
       double thickness,
-      String? identifier,
+      String identifier,
       String label,
       List<StringAttribute> labelAttributes,
       String value,