diff --git a/src/setup.h b/src/setup.h
index 1533cba2b..4d49190a8 100644
--- a/src/setup.h
+++ b/src/setup.h
@@ -48,8 +48,8 @@
 #endif
 #endif
 
-#ifdef MALLOCDEBUG
-/* This is an ugly hack for MALLOCDEBUG conditions only. We need to include
+#ifdef CURLDEBUG
+/* This is an ugly hack for CURLDEBUG conditions only. We need to include
    the file here, since it might set the _FILE_OFFSET_BITS define, which must
    be set BEFORE all normal system headers. */
 #include "../lib/setup.h"