diff --git a/pkg/analyzer/lib/src/summary2/linked_unit_context.dart b/pkg/analyzer/lib/src/summary2/linked_unit_context.dart
index a68d7da..2abe4c3 100644
--- a/pkg/analyzer/lib/src/summary2/linked_unit_context.dart
+++ b/pkg/analyzer/lib/src/summary2/linked_unit_context.dart
@@ -670,7 +670,7 @@
 
   bool hasImplicitReturnType(AstNode node) {
     if (node is FunctionDeclaration) {
-      LazyFunctionDeclaration.readFunctionExpression(_astReader, node);
+      LazyFunctionDeclaration.readReturnTypeNode(_astReader, node);
       return node.returnType == null;
     }
     if (node is MethodDeclaration) {
diff --git a/pkg/analyzer/test/src/summary/resynthesize_common.dart b/pkg/analyzer/test/src/summary/resynthesize_common.dart
index b8536df..c201a7c 100644
--- a/pkg/analyzer/test/src/summary/resynthesize_common.dart
+++ b/pkg/analyzer/test/src/summary/resynthesize_common.dart
@@ -6065,6 +6065,22 @@
 ''');
   }
 
+  test_function_hasImplicitReturnType_false() async {
+    var library = await checkLibrary('''
+int f() => 0;
+''');
+    var f = library.definingCompilationUnit.functions.single;
+    expect(f.hasImplicitReturnType, isFalse);
+  }
+
+  test_function_hasImplicitReturnType_true() async {
+    var library = await checkLibrary('''
+f() => 0;
+''');
+    var f = library.definingCompilationUnit.functions.single;
+    expect(f.hasImplicitReturnType, isTrue);
+  }
+
   test_function_parameter_final() async {
     var library = await checkLibrary('f(final x) {}');
     checkElementText(library, r'''
@@ -8471,6 +8487,28 @@
 ''');
   }
 
+  test_method_hasImplicitReturnType_false() async {
+    var library = await checkLibrary('''
+class C {
+  int m() => 0;
+}
+''');
+    var c = library.definingCompilationUnit.types.single;
+    var m = c.methods.single;
+    expect(m.hasImplicitReturnType, isFalse);
+  }
+
+  test_method_hasImplicitReturnType_true() async {
+    var library = await checkLibrary('''
+class C {
+  m() => 0;
+}
+''');
+    var c = library.definingCompilationUnit.types.single;
+    var m = c.methods.single;
+    expect(m.hasImplicitReturnType, isTrue);
+  }
+
   test_method_inferred_type_nonStatic_implicit_param() async {
     var library = await checkLibrary('class C extends D { void f(value) {} }'
         ' abstract class D { void f(int value); }');