diff --git a/kmod/src/format.h b/kmod/src/format.h
index 133da842..3a82de45 100644
--- a/kmod/src/format.h
+++ b/kmod/src/format.h
@@ -862,8 +862,7 @@ struct scoutfs_inode {
 
 #define SCOUTFS_WORM_V1_BIT (1 << 0)
 #define SCOUTFS_INODE_FMT_V2_BYTES sizeof(struct scoutfs_inode)
-#define SCOUTFS_INODE_FMT_V1_BYTES (SCOUTFS_INODE_FMT_V2_BYTES -    \
-    offsetof(struct scoutfs_inode, worm_bits))
+#define SCOUTFS_INODE_FMT_V1_BYTES offsetof(struct scoutfs_inode, worm_bits)
 
 #define SCOUTFS_INO_FLAG_TRUNCATE 0x1