diff --git a/lib_generic/zlib.c b/lib_generic/zlib.c
index 8fe3bd0dd1..ef1fa22806 100644
--- a/lib_generic/zlib.c
+++ b/lib_generic/zlib.c
@@ -28,6 +28,8 @@
 
 #include "u-boot/zlib.h"
 #include <common.h>
+#undef	OFF				/* avoid conflicts */
+
 /* To avoid a build time warning */
 #ifdef STDC
 #include <malloc.h>