diff --git a/Tests/CompileCommandOutput/relative.h b/Tests/CompileCommandOutput/relative.h
index 2168035cc6..ddfe5519bc 100644
--- a/Tests/CompileCommandOutput/relative.h
+++ b/Tests/CompileCommandOutput/relative.h
@@ -1 +1,11 @@
-void relative();
+#if defined(_WIN32)
+# ifdef test2_EXPORTS
+#  define TEST2_EXPORT __declspec(dllexport)
+# else
+#  define TEST2_EXPORT __declspec(dllimport)
+# endif
+#else
+# define TEST2_EXPORT
+#endif
+
+TEST2_EXPORT void relative();