-#elif defined(_WIN32)
-# define XBT_PUBLIC(type) __declspec(dllimport) type
-# define XBT_EXPORT_NO_IMPORT(type) type
-# define XBT_IMPORT_NO_EXPORT(type) __declspec(dllimport) type
+#elif (defined(_WIN32) && !defined(DLL_EXPORT))
+# define XBT_PUBLIC(type) __declspec(dllimport) type
+# define XBT_EXPORT_NO_IMPORT(type) type
+# define XBT_IMPORT_NO_EXPORT(type) __declspec(dllimport) type
+# define XBT_PUBLIC_DATA(type) __declspec(dllimport) type