diff --git a/kernel-shared/ctree.c b/kernel-shared/ctree.c
index 5db73352..92cd9600 100644
--- a/kernel-shared/ctree.c
+++ b/kernel-shared/ctree.c
@@ -2439,7 +2439,7 @@ again:
 int btrfs_split_item(struct btrfs_trans_handle *trans,
 		     struct btrfs_root *root,
 		     struct btrfs_path *path,
-		     struct btrfs_key *new_key,
+		     const struct btrfs_key *new_key,
 		     unsigned long split_offset)
 {
 	u32 item_size;
diff --git a/kernel-shared/ctree.h b/kernel-shared/ctree.h
index 1bc5aa36..8bcbaaee 100644
--- a/kernel-shared/ctree.h
+++ b/kernel-shared/ctree.h
@@ -988,7 +988,7 @@ void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
 int btrfs_split_item(struct btrfs_trans_handle *trans,
 		     struct btrfs_root *root,
 		     struct btrfs_path *path,
-		     struct btrfs_key *new_key,
+		     const struct btrfs_key *new_key,
 		     unsigned long split_offset);
 int btrfs_search_slot(struct btrfs_trans_handle *trans,
 		struct btrfs_root *root, const struct btrfs_key *key,