diff --git a/Parser/grammar.c b/Parser/grammar.c
index 51bf90e..5eebd31 100644
--- a/Parser/grammar.c
+++ b/Parser/grammar.c
@@ -171,7 +171,7 @@
 {
 	int i;
 
-#ifdef DEBUG
+#ifdef Py_DEBUG
 	printf("Translating labels ...\n");
 #endif
 	/* Don't translate EMPTY */