diff --git a/Python/pystate.c b/Python/pystate.c
index cc25e3e..086789d 100644
--- a/Python/pystate.c
+++ b/Python/pystate.c
@@ -68,6 +68,7 @@
 			Py_FatalError("Can't initialize threads for interpreter");
 #endif
 		interp->modules = NULL;
+		interp->modules_reloading = NULL;
 		interp->sysdict = NULL;
 		interp->builtins = NULL;
 		interp->tstate_head = NULL;
@@ -107,6 +108,7 @@
 	Py_CLEAR(interp->codec_search_cache);
 	Py_CLEAR(interp->codec_error_registry);
 	Py_CLEAR(interp->modules);
+	Py_CLEAR(interp->modules_reloading);
 	Py_CLEAR(interp->sysdict);
 	Py_CLEAR(interp->builtins);
 }