diff --git a/examples/batched.swift/Sources/main.swift b/examples/batched.swift/Sources/main.swift
index a1ac6562d..d002036c0 100644
--- a/examples/batched.swift/Sources/main.swift
+++ b/examples/batched.swift/Sources/main.swift
@@ -81,7 +81,11 @@ for (i, token) in tokens.enumerated() {
     batch.token[i] = token
     batch.pos[i] = Int32(i)
     batch.n_seq_id[i] = 1
-    batch.seq_id[i][0] = 0
+    // batch.seq_id[i][0] = 0
+    // TODO: is this the proper way to do this?
+    if let seq_id = batch.seq_id[i] {
+        seq_id[0] = 0
+    }
     batch.logits[i] = 0
 }
 
@@ -171,7 +175,9 @@ while n_cur <= n_len {
         batch.token[Int(batch.n_tokens)] = new_token_id
         batch.pos[Int(batch.n_tokens)] = n_cur
         batch.n_seq_id[Int(batch.n_tokens)] = 1
-        batch.seq_id[Int(batch.n_tokens)][0] = Int32(i)
+        if let seq_id = batch.seq_id[Int(batch.n_tokens)] {
+            seq_id[0] = Int32(i)
+        }
         batch.logits[Int(batch.n_tokens)] = 1
 
         i_batch[i] = batch.n_tokens