diff --git a/cli/src/merge_tools/builtin.rs b/cli/src/merge_tools/builtin.rs
index 6f444ec0a..5a65aab61 100644
--- a/cli/src/merge_tools/builtin.rs
+++ b/cli/src/merge_tools/builtin.rs
@@ -21,7 +21,7 @@ pub enum BuiltinToolError {
     Record(#[from] scm_record::RecordError),
     #[error(transparent)]
     ReadFileBackend(BackendError),
-    #[error("Failed to read file {path:?} with ID {id:?}: {source}")]
+    #[error("Failed to read file {path:?} with ID {id}: {source}", id = id.hex())]
     ReadFileIo {
         path: RepoPathBuf,
         id: FileId,
diff --git a/lib/src/default_index/store.rs b/lib/src/default_index/store.rs
index 3978f0c24..94de84cfc 100644
--- a/lib/src/default_index/store.rs
+++ b/lib/src/default_index/store.rs
@@ -39,7 +39,10 @@ use crate::store::Store;
 
 #[derive(Debug, Error)]
 pub enum DefaultIndexStoreError {
-    #[error("Failed to associate commit index file with a operation {op_id:?}: {source}")]
+    #[error(
+        "Failed to associate commit index file with an operation {op_id}: {source}",
+        op_id = op_id.hex()
+    )]
     AssociateIndex {
         op_id: OperationId,
         source: io::Error,