diff --git a/packages/runner-vm/src/instanceof.ts b/packages/runner-vm/src/instanceof.ts
index a27986087..4194ba70b 100644
--- a/packages/runner-vm/src/instanceof.ts
+++ b/packages/runner-vm/src/instanceof.ts
@@ -85,6 +85,7 @@ function ordinaryHasInstance(C: any, O: any): boolean {
   // 2. If C has a [[BoundTargetFunction]] internal slot, ... (IGNORED)
   // 3. If Type(O) is not Object, return false.
   if (typeof O !== "object" && typeof O !== "function") return false;
+  if (O === null) return false;
   // 4. Let P be ? Get(C, "prototype").
   const P = C.prototype;
   // 5. If Type(P) is not Object, throw a TypeError exception.