diff --git a/pubspec.yaml b/pubspec.yaml
index b5e92e78c..0ab522c75 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -42,7 +42,7 @@ dev_dependencies:
   archive: ^3.1.2
   crypto: ^3.0.0
   dart_style: ^2.0.0
-  dartdoc: ^6.0.0
+  dartdoc: ">=6.0.0 <8.0.0"
   grinder: ^0.9.0
   node_preamble: ^2.0.2
   lints: ^2.0.0
diff --git a/tool/grind/synchronize.dart b/tool/grind/synchronize.dart
index 87ab7af5d..de18066d2 100644
--- a/tool/grind/synchronize.dart
+++ b/tool/grind/synchronize.dart
@@ -247,6 +247,9 @@ class _Visitor extends RecursiveAstVisitor<void> {
     } else if (node.name2.lexeme == "Module") {
       _skipNode(node);
       _buffer.write("Module<Callable>");
+    } else if (node.typeArguments == null) {
+      _skip(node.name2);
+      _buffer.write(_synchronizeName(node.name2.lexeme));
     } else {
       super.visitNamedType(node);
     }