fix compiler warning
diff --git a/Modules/_gestalt.c b/Modules/_gestalt.c
index 7fb1bc9..3a7279f 100644
--- a/Modules/_gestalt.c
+++ b/Modules/_gestalt.c
@@ -77,7 +77,7 @@
 	NULL
 };
 
-void
+PyMODINIT_FUNC
 PyInit__gestalt(void)
 {
 	return PyModule_Create(&gestaltmodule);