diff --git a/Objects/classobject.c b/Objects/classobject.c
index 48ea2e7..f5a0d2a 100644
--- a/Objects/classobject.c
+++ b/Objects/classobject.c
@@ -347,8 +347,8 @@
 	object *del;
 	/* Call the __del__ method if it exists.  First temporarily
 	   revive the object and save the current exception, if any. */
-#ifdef TRACE_REFS
-	/* much too complicated if TRACE_REFS defined */
+#ifdef Py_TRACE_REFS
+	/* much too complicated if Py_TRACE_REFS defined */
 	extern long ref_total;
 	inst->ob_type = &Instancetype;
 	NEWREF(inst);
@@ -356,9 +356,9 @@
 #ifdef COUNT_ALLOCS
 	inst->ob_type->tp_alloc--; /* ditto */
 #endif
-#else
+#else /* !Py_TRACE_REFS */
 	INCREF(inst);
-#endif /* TRACE_REFS */
+#endif /* !Py_TRACE_REFS */
 	err_fetch(&error_type, &error_value, &error_traceback);
 	if ((del = instance_getattr1(inst, "__del__")) != NULL) {
 		object *res = call_object(del, (object *)NULL);
@@ -375,13 +375,13 @@
 #endif
 		return; /* __del__ added a reference; don't delete now */
 	}
-#ifdef TRACE_REFS
+#ifdef Py_TRACE_REFS
 #ifdef COUNT_ALLOCS
 	inst->ob_type->tp_free--;	/* compensate for increment in UNREF */
 #endif
 	UNREF(inst);
 	inst->ob_type = NULL;
-#endif /* TRACE_REFS */
+#endif /* Py_TRACE_REFS */
 	DECREF(inst->in_class);
 	XDECREF(inst->in_dict);
 	free((ANY *)inst);
diff --git a/Objects/stringobject.c b/Objects/stringobject.c
index ac03ff6..1e11c50 100644
--- a/Objects/stringobject.c
+++ b/Objects/stringobject.c
@@ -507,7 +507,7 @@
 		return -1;
 	}
 	/* XXX UNREF/NEWREF interface should be more symmetrical */
-#ifdef REF_DEBUG
+#ifdef Py_REF_DEBUG
 	--_Py_RefTotal;
 #endif
 	UNREF(v);
diff --git a/Objects/tupleobject.c b/Objects/tupleobject.c
index 2218e50..19c3641 100644
--- a/Objects/tupleobject.c
+++ b/Objects/tupleobject.c
@@ -418,7 +418,7 @@
 	if (sizediff == 0)
 		return 0;
 	/* XXX UNREF/NEWREF interface should be more symmetrical */
-#ifdef REF_DEBUG
+#ifdef Py_REF_DEBUG
 	--_Py_RefTotal;
 #endif
 	UNREF(v);