diff --git a/pkg/analyzer/lib/src/fasta/ast_building_factory.dart b/pkg/analyzer/lib/src/fasta/ast_building_factory.dart
index 1279ad1cd3d..91ec0fa7abb 100644
--- a/pkg/analyzer/lib/src/fasta/ast_building_factory.dart
+++ b/pkg/analyzer/lib/src/fasta/ast_building_factory.dart
@@ -247,6 +247,11 @@ class AstBuildingForest
   int getTypeCount(TypeArgumentList typeArguments) =>
       typeArguments.arguments.length;
 
+  @override
+  String getVariableDeclarationName(VariableDeclaration declaration) {
+    return declaration.name.name;
+  }
+
   @override
   Statement ifStatement(
           Token ifKeyword,
diff --git a/pkg/front_end/lib/src/fasta/kernel/body_builder.dart b/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
index 86a9cf34ad5..2f2013a07ea 100644
--- a/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
@@ -358,8 +358,8 @@ abstract class BodyBuilder<Expression, Statement, Arguments>
     }
   }
 
-  void declareVariable(VariableDeclaration variable, Scope scope) {
-    String name = variable.name;
+  void declareVariable(Object variable, Scope scope) {
+    String name = forest.getVariableDeclarationName(variable);
     Builder existing = scope.local[name];
     if (existing != null) {
       // This reports an error for duplicated declarations in the same scope:
@@ -373,7 +373,7 @@ abstract class BodyBuilder<Expression, Statement, Arguments>
       return;
     }
     LocatedMessage context = scope.declare(
-        variable.name,
+        forest.getVariableDeclarationName(variable),
         new KernelVariableBuilder(
             variable, member ?? classBuilder ?? library, uri),
         uri);
diff --git a/pkg/front_end/lib/src/fasta/kernel/fangorn.dart b/pkg/front_end/lib/src/fasta/kernel/fangorn.dart
index a5f104166d0..4c7808bd703 100644
--- a/pkg/front_end/lib/src/fasta/kernel/fangorn.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/fangorn.dart
@@ -545,6 +545,11 @@ class Fangorn extends Forest<Expression, Statement, Token, Arguments> {
   @override
   int getLabelOffset(Label label) => label.charOffset;
 
+  @override
+  String getVariableDeclarationName(VariableDeclaration declaration) {
+    return declaration.name;
+  }
+
   @override
   bool isBlock(Object node) => node is Block;
 
diff --git a/pkg/front_end/lib/src/fasta/kernel/forest.dart b/pkg/front_end/lib/src/fasta/kernel/forest.dart
index b8b3ab39dac..f92f493cf82 100644
--- a/pkg/front_end/lib/src/fasta/kernel/forest.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/forest.dart
@@ -322,6 +322,9 @@ abstract class Forest<Expression, Statement, Location, Arguments> {
   /// Return the offset of the given [label].
   int getLabelOffset(covariant label);
 
+  /// Return the name of the given variable [declaration].
+  String getVariableDeclarationName(covariant declaration);
+
   bool isBlock(Object node);
 
   /// Return `true` if the given [statement] is the representation of an empty