diff --git a/Include/funcobject.h b/Include/funcobject.h
index 84b0dcf..cb36518 100644
--- a/Include/funcobject.h
+++ b/Include/funcobject.h
@@ -39,7 +39,7 @@
 	object *func_argdefs;
 } funcobject;
 
-extern typeobject Functype;
+extern DL_IMPORT typeobject Functype;
 
 #define is_funcobject(op) ((op)->ob_type == &Functype)