diff --git a/lib/write_log.c b/lib/write_log.c
index 7d034b0..2367c7d 100644
--- a/lib/write_log.c
+++ b/lib/write_log.c
@@ -74,7 +74,7 @@
 #include "write_log.h"
 
 #ifndef BSIZE
-#ifdef linux
+#ifdef DEV_BSIZE
 #define BSIZE DEV_BSIZE
 #else
 #define BSIZE BBSIZE