diff --git a/pkg/front_end/lib/src/fasta/kernel/kernel_formal_parameter_builder.dart b/pkg/front_end/lib/src/fasta/kernel/kernel_formal_parameter_builder.dart
index 5646641..b41180a 100644
--- a/pkg/front_end/lib/src/fasta/kernel/kernel_formal_parameter_builder.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/kernel_formal_parameter_builder.dart
@@ -4,7 +4,7 @@
 
 library fasta.kernel_formal_parameter_builder;
 
-import 'kernel_shadow_ast.dart' show VariableDeclarationJudgment;
+import 'package:kernel/ast.dart' show VariableDeclaration;
 
 import '../modifier.dart' show finalMask;
 
@@ -15,12 +15,11 @@
         KernelTypeBuilder,
         MetadataBuilder;
 
-import '../source/source_library_builder.dart' show SourceLibraryBuilder;
+import 'kernel_shadow_ast.dart' show VariableDeclarationJudgment;
 
 class KernelFormalParameterBuilder
     extends FormalParameterBuilder<KernelTypeBuilder> {
-  VariableDeclarationJudgment declaration;
-  final int charOffset;
+  VariableDeclaration declaration;
 
   KernelFormalParameterBuilder(
       List<MetadataBuilder> metadata,
@@ -29,13 +28,13 @@
       String name,
       bool hasThis,
       KernelLibraryBuilder compilationUnit,
-      this.charOffset)
+      int charOffset)
       : super(metadata, modifiers, type, name, hasThis, compilationUnit,
             charOffset);
 
-  VariableDeclarationJudgment get target => declaration;
+  VariableDeclaration get target => declaration;
 
-  VariableDeclarationJudgment build(SourceLibraryBuilder library) {
+  VariableDeclaration build(KernelLibraryBuilder library) {
     if (declaration == null) {
       declaration = new VariableDeclarationJudgment(name, 0,
           type: type?.build(library),