diff --git a/source/mijin/util/winundef.hpp b/source/mijin/util/winundef.hpp
index 9a155cb..715fc40 100644
--- a/source/mijin/util/winundef.hpp
+++ b/source/mijin/util/winundef.hpp
@@ -22,3 +22,7 @@
 #if defined(RELATIVE)
 #undef RELATIVE
 #endif
+
+#if defined(DEBUG)
+#undef DEBUG
+#endif