--- spack-src/src/c/ext_falcon.c.org	2020-01-15 17:40:41.279400137 +0900
+++ spack-src/src/c/ext_falcon.c	2020-01-15 17:44:47.785718088 +0900
@@ -9,5 +9,6 @@
 
     m = Py_InitModule("ext_falcon", SpamMethods);
     if (m == NULL)
-        return;
+        Py_INCREF(Py_None);
+        return Py_None;
 }