diff --git a/tokenserver-db-sqlite/src/models.rs b/tokenserver-db-sqlite/src/models.rs
index f552739eb2..6c95c93d76 100644
--- a/tokenserver-db-sqlite/src/models.rs
+++ b/tokenserver-db-sqlite/src/models.rs
@@ -4,6 +4,7 @@ SELECT rowid as id
 FROM nodes
 WHERE service = ?
 AND node = ?"#;
+// FIXME: MySQL specific
 pub const REPLACE_USERS_SYNC_QUERY: &str = r#"
 UPDATE users
 SET replaced_at = ?
@@ -30,6 +31,7 @@ AND email = ?
 AND generation <= ?
 AND COALESCE(keys_changed_at, 0) <= COALESCE(?, keys_changed_at, 0)
 AND replaced_at IS NULL"#;
+// FIXME: MySQL specific
 pub const POST_USER_SYNC_QUERY: &str = r#"
 INSERT INTO users (service, email, generation, client_state, created_at, nodeid, keys_changed_at, replaced_at)
 VALUES (?, ?, ?, ?, ?, ?, ?, ?);"#;
@@ -51,6 +53,7 @@ WHERE service = ?
 AND available <= 0
 AND capacity > current_load
 AND downed = 0"#;
+// FIXME: MySQL specific
 pub const GET_BEST_NODE_SPANNER_QUERY: &str = r#"
 SELECT id, node
 FROM nodes
diff --git a/tokenserver-db/src/models.rs b/tokenserver-db/src/models.rs
index 5b0f5f49db..c530af069c 100644
--- a/tokenserver-db/src/models.rs
+++ b/tokenserver-db/src/models.rs
@@ -55,7 +55,7 @@ struct DbInner {
 
 impl TokenserverDb {
     // Note that this only works because an instance of `TokenserverDb` has *exclusive access* to
-    // a connection from the r2d2 pool for its lifetime. `LAST_INSERT_ID()`/`LAST_INSERT_ROWID()`
+    // a connection from the r2d2 pool for its lifetime. `LAST_INSERT_ID_QUERY`
     // returns the ID of the most recently-inserted record *for a given connection*.
     // If connections were shared across requests, using this function would introduce a race condition,
     // as we could potentially get IDs from records created during other requests.
@@ -163,7 +163,6 @@ impl TokenserverDb {
             .execute(&self.inner.conn)?;
 
         diesel::sql_query(LAST_INSERT_ID_QUERY)
-            .bind::<Text, _>(&user.email)
             .get_result::<results::PostUser>(&self.inner.conn)
             .map_err(Into::into)
     }