diff --git a/zcash_client_sqlite/src/lib.rs b/zcash_client_sqlite/src/lib.rs
index e7fdc55cd..788d00b50 100644
--- a/zcash_client_sqlite/src/lib.rs
+++ b/zcash_client_sqlite/src/lib.rs
@@ -224,7 +224,7 @@ impl AccountUuid {
 /// This is an ephemeral value for efficiently and generically working with accounts in a
 /// [`WalletDb`]. To reference accounts in external contexts, use [`AccountUuid`].
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash, Default, PartialOrd, Ord)]
-pub(crate) struct AccountRef(u32);
+pub(crate) struct AccountRef(i64);
 
 /// This implementation is retained under `#[cfg(test)]` for pre-AccountUuid testing.
 #[cfg(test)]
diff --git a/zcash_client_sqlite/src/wallet/init/migrations/transparent_gap_limit_handling.rs b/zcash_client_sqlite/src/wallet/init/migrations/transparent_gap_limit_handling.rs
index a9b65eff4..affbe19db 100644
--- a/zcash_client_sqlite/src/wallet/init/migrations/transparent_gap_limit_handling.rs
+++ b/zcash_client_sqlite/src/wallet/init/migrations/transparent_gap_limit_handling.rs
@@ -84,7 +84,7 @@ pub(super) fn insert_initial_transparent_addrs<P: consensus::Parameters>(
         ":key_scope_external": KeyScope::EXTERNAL.encode()
     ])?;
     while let Some(row) = min_addr_rows.next()? {
-        let account_id = AccountRef(row.get::<_, u32>("account_id")?);
+        let account_id = AccountRef(row.get("account_id")?);
 
         let min_transparent_idx = row
             .get::<_, Option<u32>>("transparent_child_index")?
@@ -716,7 +716,7 @@ impl<P: consensus::Parameters, C: Clock, R: RngCore> RusqliteMigration for Migra
                 generate_gap_addresses(
                     conn,
                     &self.params,
-                    AccountRef(account_id.try_into().unwrap()),
+                    AccountRef(account_id),
                     key_scope,
                     &GapLimits::default(),
                     UnifiedAddressRequest::unsafe_custom(Allow, Allow, Require),