diff --git a/yama/src/chunking.rs b/yama/src/chunking.rs
index d06d548..286fca3 100644
--- a/yama/src/chunking.rs
+++ b/yama/src/chunking.rs
@@ -73,10 +73,10 @@ impl<'pile, RP: RawPile> RecursiveChunker<'pile, RP> {
             let is_final = chunk.offset + chunk.length == self.buffer.len();
             if !is_final || finalise {
                 consumed_until = Some(chunk.offset + chunk.length);
-                let chunk_id = self
-                    .pile
-                    .submit_chunk(&self.buffer[chunk.offset..chunk.offset + chunk.length])?;
+                let chunk_data = &self.buffer[chunk.offset..chunk.offset + chunk.length];
+                let chunk_id = calculate_chunkid(chunk_data);
                 new_chunks.extend_from_slice(&chunk_id);
+                self.pile.submit_chunk(chunk_id, chunk_data)?;
             }
         }
 
@@ -101,7 +101,8 @@ impl<'pile, RP: RawPile> RecursiveChunker<'pile, RP> {
             Ok(rcr)
         } else {
             // no chunking, so depth=0 (raw) and just emit our unchunked data
-            let chunk_id = self.pile.submit_chunk(&self.buffer)?;
+            let chunk_id = calculate_chunkid(&self.buffer);
+            self.pile.submit_chunk(chunk_id, &self.buffer)?;
             Ok(RecursiveChunkRef { chunk_id, depth: 0 })
         }
     }
diff --git a/yama/src/pile.rs b/yama/src/pile.rs
index df2ec2d..0f99fd9 100644
--- a/yama/src/pile.rs
+++ b/yama/src/pile.rs
@@ -19,7 +19,6 @@ use std::path::PathBuf;
 
 use serde::{Deserialize, Serialize};
 
-use crate::chunking::calculate_chunkid;
 use crate::definitions::{ChunkId, PointerData};
 use crossbeam_channel::Sender;
 use std::collections::HashSet;
@@ -290,9 +289,7 @@ impl<R: RawPile> Pile<R> {
         Ok(result)
     }
 
-    pub fn submit_chunk(&self, chunk_data: &[u8]) -> anyhow::Result<ChunkId> {
-        let chunk_id = calculate_chunkid(chunk_data);
-
+    pub fn submit_chunk(&self, chunk_id: ChunkId, chunk_data: &[u8]) -> anyhow::Result<()> {
         let mut racy_submissions = self.racy_submission_mutex.lock().unwrap();
         if racy_submissions.insert(chunk_id) {
             drop(racy_submissions);
@@ -311,7 +308,7 @@ impl<R: RawPile> Pile<R> {
                 }
             }
         }
-        Ok(chunk_id)
+        Ok(())
     }
 
     /// Flushes buffered writes. Should really run this before exiting, so I can sleep better at