diff --git a/src/bindings/mod.rs b/src/bindings/mod.rs
index 86eab4f..384ba3d 100644
--- a/src/bindings/mod.rs
+++ b/src/bindings/mod.rs
@@ -572,7 +572,15 @@ impl ContextWrapper {
                     let res_val = global.property_require("__promiseResult")?;
                     if res_val.is_bool() {
                         let ok = res_val.to_bool()?;
-                        let value = global.property_require("__promiseValue")?;
+                        let value = global.property("__promiseValue")?.unwrap_or_else(|| {
+                            OwnedJsValue::new(
+                                self,
+                                q::JSValue {
+                                    u: q::JSValueUnion { int32: 0 },
+                                    tag: TAG_UNDEFINED,
+                                },
+                            )
+                        });
 
                         if ok {
                             return self.resolve_value(value);
diff --git a/src/tests.rs b/src/tests.rs
index 00b5a4e..24c30c8 100644
--- a/src/tests.rs
+++ b/src/tests.rs
@@ -622,3 +622,9 @@ fn test_global_setter() {
     ctx.set_global("a", "a").unwrap();
     ctx.eval("a + 1").unwrap();
 }
+
+#[test]
+fn test_async_fn_returning_undefined() {
+    let ctx = Context::new().unwrap();
+    ctx.eval("(async () => undefined)()").unwrap();
+}
\ No newline at end of file