diff --git a/Objects/genobject.c b/Objects/genobject.c
index 0efd57d..0837698 100644
--- a/Objects/genobject.c
+++ b/Objects/genobject.c
@@ -255,7 +255,7 @@
         if (PyCoro_CheckExact(gen)) {
             msg = "coroutine raised StopIteration";
         }
-        else if PyAsyncGen_CheckExact(gen) {
+        else if (PyAsyncGen_CheckExact(gen)) {
             msg = "async generator raised StopIteration";
         }
         _PyErr_FormatFromCause(PyExc_RuntimeError, "%s", msg);