diff --git a/pkg/front_end/lib/src/base/incremental_compiler.dart b/pkg/front_end/lib/src/base/incremental_compiler.dart
index 751170ad675..53d0ac920d4 100644
--- a/pkg/front_end/lib/src/base/incremental_compiler.dart
+++ b/pkg/front_end/lib/src/base/incremental_compiler.dart
@@ -1830,7 +1830,8 @@ class IncrementalCompiler implements IncrementalKernelGenerator {
           }
 
           debugLibrary.compilationUnit.addSyntheticImport(
-              uri: dependency.importedLibraryReference.canonicalName!.name,
+              importUri:
+                  dependency.importedLibraryReference.asLibrary.importUri,
               prefix: dependency.name,
               combinators: combinators,
               deferred: dependency.isDeferred);
diff --git a/pkg/front_end/lib/src/builder/library_builder.dart b/pkg/front_end/lib/src/builder/library_builder.dart
index 78277bc8908..c14ff6ecdea 100644
--- a/pkg/front_end/lib/src/builder/library_builder.dart
+++ b/pkg/front_end/lib/src/builder/library_builder.dart
@@ -265,7 +265,7 @@ abstract class SourceCompilationUnit
   IndexedLibrary? get indexedLibrary;
 
   void addSyntheticImport(
-      {required String uri,
+      {required Uri importUri,
       required String? prefix,
       required List<CombinatorBuilder>? combinators,
       required bool deferred});
diff --git a/pkg/front_end/lib/src/source/source_compilation_unit.dart b/pkg/front_end/lib/src/source/source_compilation_unit.dart
index b001c272eef..97dfb299131 100644
--- a/pkg/front_end/lib/src/source/source_compilation_unit.dart
+++ b/pkg/front_end/lib/src/source/source_compilation_unit.dart
@@ -910,23 +910,21 @@ class SourceCompilationUnitImpl implements SourceCompilationUnit {
   @override
   // Coverage-ignore(suite): Not run.
   void addSyntheticImport(
-      {required String uri,
+      {required Uri importUri,
       required String? prefix,
       required List<CombinatorBuilder>? combinators,
       required bool deferred}) {
     assert(
         checkState(pending: [SourceCompilationUnitState.importsAddedToScope]));
-    _fragmentFactory.addImport(
-        metadata: null,
-        isAugmentationImport: false,
-        uri: uri,
-        configurations: null,
-        prefix: prefix,
-        combinators: combinators,
-        deferred: deferred,
-        charOffset: -1,
-        prefixCharOffset: -1,
-        uriOffset: -1);
+    CompilationUnit? compilationUnit = loader.read(importUri, -1,
+        origin: null,
+        accessor: this,
+        isAugmentation: false,
+        referencesFromIndex: indexedLibrary);
+    Import import = new Import(this, compilationUnit, false, deferred, prefix,
+        combinators, null, fileUri, -1, -1,
+        nativeImportPath: null);
+    _fragmentFactoryResult.imports.add(import);
   }
 
   @override
diff --git a/pkg/front_end/tool/dart_doctest_impl.dart b/pkg/front_end/tool/dart_doctest_impl.dart
index d84aa6c06ae..66c957e93cc 100644
--- a/pkg/front_end/tool/dart_doctest_impl.dart
+++ b/pkg/front_end/tool/dart_doctest_impl.dart
@@ -1001,15 +1001,14 @@ class DocTestIncrementalCompiler extends IncrementalCompiler {
         }
 
         dartDocTestCompilationUnit.addSyntheticImport(
-            uri: dependency.importedLibraryReference.asLibrary.importUri
-                .toString(),
+            importUri: dependency.importedLibraryReference.asLibrary.importUri,
             prefix: dependency.name,
             combinators: combinators,
             deferred: dependency.isDeferred);
       }
 
       dartDocTestCompilationUnit.addSyntheticImport(
-          uri: libraryBuilder.importUri.toString(),
+          importUri: libraryBuilder.importUri,
           prefix: null,
           combinators: null,
           deferred: false);