diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index bd69e906bd916180f2e0ba5db0828c88c43e92b5..e2bb929bea93977225335bcba48ec578eb8c2f11 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -3264,7 +3264,7 @@ static int ext4_ext_convert_to_initialized(handle_t *handle,
 
 	if (EXT4_EXT_MAY_ZEROOUT & split_flag)
 		max_zeroout = sbi->s_extent_max_zeroout_kb >>
-			inode->i_sb->s_blocksize_bits;
+			(inode->i_sb->s_blocksize_bits - 10);
 
 	/* If extent is less than s_max_zeroout_kb, zeroout directly */
 	if (max_zeroout && (ee_len <= max_zeroout)) {