diff --git a/router/src/lib.rs b/router/src/lib.rs
index 64f0fafa..50d2cbf4 100644
--- a/router/src/lib.rs
+++ b/router/src/lib.rs
@@ -524,7 +524,6 @@ impl ChatCompletionChunk {
         delta: Option<String>,
         tool_calls: Option<Vec<String>>,
         created: u64,
-        index: u32,
         logprobs: Option<ChatCompletionLogprobs>,
         finish_reason: Option<String>,
     ) -> Self {
@@ -535,12 +534,12 @@ impl ChatCompletionChunk {
             model,
             system_fingerprint,
             choices: vec![ChatCompletionChoice {
-                index,
+                index: 0,
                 delta: ChatCompletionDelta {
                     role: "assistant".to_string(),
                     content: delta,
                     tool_calls: tool_calls.map(|tc| DeltaToolCall {
-                        index,
+                        index: 0,
                         id: String::new(),
                         r#type: "function".to_string(),
                         function: Function {
diff --git a/router/src/server.rs b/router/src/server.rs
index 61aacd0b..c8e6017a 100644
--- a/router/src/server.rs
+++ b/router/src/server.rs
@@ -895,7 +895,6 @@ async fn chat_completions(
                     content,
                     tool_calls,
                     current_time,
-                    stream_token.index,
                     logprobs,
                     stream_token.details.map(|d| d.finish_reason.to_string()),
                 ))