diff --git a/Modules/shamodule.c b/Modules/shamodule.c
index 8f95230..32ac02d 100644
--- a/Modules/shamodule.c
+++ b/Modules/shamodule.c
@@ -529,7 +529,7 @@
 	if (o!=NULL) PyDict_SetItemString(d,n,o); \
 	Py_XDECREF(o); }
 
-void
+DL_EXPORT(void)
 initsha(void)
 {
     PyObject *d, *m;