diff --git a/test/free_features_request.py b/test/free_features_request.py
index d4ae0ca7b..b48f2ec7d 100644
--- a/test/free_features_request.py
+++ b/test/free_features_request.py
@@ -29,6 +29,9 @@ int main()
 
 t.write("foo.cpp", """
 #ifdef FOO
+#ifdef _WIN32
+__declspec(dllexport)
+#endif
 void foo() {}
 #endif
 """)