diff --git a/Include/object.h b/Include/object.h
index a66629c..081bb86 100644
--- a/Include/object.h
+++ b/Include/object.h
@@ -22,7 +22,10 @@
 
 ******************************************************************/
 
+#ifndef DEBUG
 #define NDEBUG
+#endif
+
 /* Object and type object interface */
 
 /*