diff --git a/src/library.js b/src/library.js
index 6abe513c..cb243fc0 100644
--- a/src/library.js
+++ b/src/library.js
@@ -19,14 +19,10 @@ import width from "./width.js";
 export default Object.assign(function Library(resolver) {
   const require = requirer(resolver);
   Object.defineProperties(this, properties({
-    DOM: () => DOM,
     FileAttachment: () => NoFileAttachments,
-    Files: () => Files,
-    Generators: () => Generators,
     Inputs: () => require("@observablehq/inputs@0.8.0/dist/inputs.umd.min.js"),
     Mutable: () => Mutable,
     Plot: () => require("@observablehq/plot@0.1.0/dist/plot.umd.min.js"),
-    Promises: () => Promises,
     SQLite: () => SQLite(require),
     _: () => require("lodash@4.17.21/lodash.min.js"),
     d3: () => require("d3@6.7.0/dist/d3.min.js"),
@@ -34,13 +30,21 @@ export default Object.assign(function Library(resolver) {
     htl: () => require("htl@0.2.5/dist/htl.min.js"),
     html: () => html,
     md: () => md(require),
-    now: now,
+    now,
     require: () => require,
     resolve: () => resolve,
     svg: () => svg,
     tex: () => tex(require),
     vl: () => vegalite(require),
-    width: width
+    width,
+
+    // Note: these are namespace objects, and thus exposed directly rather than
+    // being wrapped in a function. This allows library.Generators to resolve,
+    // rather than needing module.value.
+    DOM,
+    Files,
+    Generators,
+    Promises
   }));
 }, {resolve: requireDefault.resolve});
 
diff --git a/test/generators/generators-test.js b/test/generators/generators-test.js
index 0e8e417d..3d768431 100644
--- a/test/generators/generators-test.js
+++ b/test/generators/generators-test.js
@@ -5,6 +5,13 @@ import range from "../../src/generators/range";
 import valueAt from "../../src/generators/valueAt";
 import observe from "../../src/generators/observe";
 import queue from "../../src/generators/queue";
+import Library from "../../src/library";
+
+test("library.Generators.observe is a function", t => {
+  const library = new Library();
+  t.equal(typeof library.Generators.observe, "function");
+  t.end();
+});
 
 test("filter(value, fn) filters", t => {
   function* input() {