diff --git a/vm/src/builtins/coroutine.rs b/vm/src/builtins/coroutine.rs
index 776692454..fe99d7a86 100644
--- a/vm/src/builtins/coroutine.rs
+++ b/vm/src/builtins/coroutine.rs
@@ -122,7 +122,7 @@ impl PyValue for PyCoroutineWrapper {
     }
 }
 
-#[pyimpl]
+#[pyimpl(with(PyIter))]
 impl PyCoroutineWrapper {
     #[pymethod]
     fn send(&self, val: PyObjectRef, vm: &VirtualMachine) -> PyResult {
@@ -141,6 +141,12 @@ impl PyCoroutineWrapper {
     }
 }
 
+impl PyIter for PyCoroutineWrapper {
+    fn next(zelf: &PyRef<Self>, vm: &VirtualMachine) -> PyResult {
+        zelf.send(vm.ctx.none(), vm)
+    }
+}
+
 pub fn init(ctx: &PyContext) {
     PyCoroutine::extend_class(ctx, &ctx.types.coroutine_type);
     PyCoroutineWrapper::extend_class(ctx, &ctx.types.coroutine_wrapper_type);