diff --git a/Python/mactoolboxglue.c b/Python/mactoolboxglue.c
index 6688b02..bb1ebb1 100644
--- a/Python/mactoolboxglue.c
+++ b/Python/mactoolboxglue.c
@@ -36,7 +36,7 @@
 	PyObject *m;
 	PyObject *rv;
 
-	m = PyImport_ImportModule("MacOS");
+	m = PyImport_ImportModuleNoBlock("MacOS");
 	if (!m) {
 		if (Py_VerboseFlag)
 			PyErr_Print();