diff --git a/packages/compiler/src/frontend/lowering/lowerer.ts b/packages/compiler/src/frontend/lowering/lowerer.ts
index 9acba4606..d1eb4bd7a 100644
--- a/packages/compiler/src/frontend/lowering/lowerer.ts
+++ b/packages/compiler/src/frontend/lowering/lowerer.ts
@@ -1168,6 +1168,10 @@ export function lowerToIr(
 function markModuleInitFences(program: ts.Program, fences: readonly ScrDiagnostic[]): void {
   for (const d of fences) {
     if (!d.loc.file.includes("/node_modules/")) continue;
+    // A fence without a source position belongs to synthesized code, such
+    // as the global object's lookup (global-values.ts), which runs when the
+    // program calls it, not when the module evaluates.
+    if (d.loc.start < 0) continue;
     const sf = program.getSourceFile(d.loc.file);
     if (sf === undefined) continue;
     let inFunction = false;
diff --git a/tests/fixtures/node-island/order/node_modules/orderkit/index.js b/tests/fixtures/node-island/order/node_modules/orderkit/index.js
index 072e3c4ff..9d4bfa8f4 100644
--- a/tests/fixtures/node-island/order/node_modules/orderkit/index.js
+++ b/tests/fixtures/node-island/order/node_modules/orderkit/index.js
@@ -1,5 +1,6 @@
 "use strict";
-// Loads its part through a computed specifier, so it runs in a Node island.
+// Loads its part through a computed specifier when it loads, so it runs in
+// a Node island.
 const { createRequire } = require("node:module");
-const parts = ["./thing"].map((p) => createRequire(__filename)(p));
+const parts = [createRequire(__filename)(["./thing"][0])];
 exports.make = () => new parts[0].Thing();