Rename DEBUG macro to Py_DEBUG
diff --git a/Include/object.h b/Include/object.h
index e876e91..54b5481 100644
--- a/Include/object.h
+++ b/Include/object.h
@@ -84,7 +84,7 @@
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 */
 
-#ifdef DEBUG
+#ifdef Py_DEBUG
 
 /* Turn on heavy reference debugging */
 #define Py_TRACE_REFS
@@ -92,7 +92,7 @@
 /* Turn on reference counting */
 #define Py_REF_DEBUG
 
-#endif /* DEBUG */
+#endif /* Py_DEBUG */
 
 #ifdef Py_TRACE_REFS
 #define PyObject_HEAD \