diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index f2fa5e8..3424e82 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4617,7 +4617,7 @@
 	/*
 	 * Figure out the offset within the block group inode table
 	 */
-	inodes_per_block = (EXT4_BLOCK_SIZE(sb) / EXT4_INODE_SIZE(sb));
+	inodes_per_block = EXT4_SB(sb)->s_inodes_per_block;
 	inode_offset = ((inode->i_ino - 1) %
 			EXT4_INODES_PER_GROUP(sb));
 	block = ext4_inode_table(sb, gdp) + (inode_offset / inodes_per_block);