diff --git a/include/linux/ext3_fs.h b/include/linux/ext3_fs.h
index 6ce1bca..a443965 100644
--- a/include/linux/ext3_fs.h
+++ b/include/linux/ext3_fs.h
@@ -856,6 +856,7 @@
 extern int ext3_should_retry_alloc(struct super_block *sb, int *retries);
 extern void ext3_init_block_alloc_info(struct inode *);
 extern void ext3_rsv_window_add(struct super_block *sb, struct ext3_reserve_window_node *rsv);
+extern int ext3_trim_fs(struct super_block *sb, struct fstrim_range *range);
 
 /* dir.c */
 extern int ext3_check_dir_entry(const char *, struct inode *,