1 files changed, 1 insertions, 0 deletions
diff --git a/private.h b/private.h
index 6beb35b..7a1250c 100644
--- a/private.h
+++ b/private.h
@@ -1,6 +1,7 @@
 #ifndef _FASTWRITER_PRIVATE_H
 #define _FASTWRITER_PRIVATE_H
 
+#define FASTWRITER_SYNCIO_ALIGN 512
 #define FASTWRITER_DEFAULT_BUFFER_SIZE 134217728 /* 128 MB */
 #define FASTWRITER_RESERVE_MEMORY 536870912 /* 512 MB */