diff --git a/Objects/moduleobject.c b/Objects/moduleobject.c
index 1f419ad..499ce09a 100644
--- a/Objects/moduleobject.c
+++ b/Objects/moduleobject.c
@@ -3,7 +3,7 @@
 
 #include "Python.h"
 #include "pycore_interp.h"    // PyInterpreterState.importlib
-#include "pycore_pystate.h"
+#include "pycore_pystate.h"   // _PyInterpreterState_GET()
 #include "structmember.h"
 
 static Py_ssize_t max_module_number;