diff --git a/fs/incfs/vfs.c b/fs/incfs/vfs.c
index b5ec4edc3b7a..ea29534bea53 100644
--- a/fs/incfs/vfs.c
+++ b/fs/incfs/vfs.c
@@ -2180,7 +2180,7 @@ struct dentry *incfs_mount_fs(struct file_system_type *type, int flags,
 	sb->s_op = &incfs_super_ops;
 	sb->s_d_op = &incfs_dentry_ops;
 	sb->s_flags |= S_NOATIME;
-	sb->s_magic = INCFS_MAGIC_NUMBER;
+	sb->s_magic = (long)INCFS_MAGIC_NUMBER;
 	sb->s_time_gran = 1;
 	sb->s_blocksize = INCFS_DATA_FILE_BLOCK_SIZE;
 	sb->s_blocksize_bits = blksize_bits(sb->s_blocksize);