diff --git a/src/agents/ollama-stream.ts b/src/agents/ollama-stream.ts
index 5040b37737a..fdff0b2ae65 100644
--- a/src/agents/ollama-stream.ts
+++ b/src/agents/ollama-stream.ts
@@ -405,7 +405,10 @@ function resolveOllamaChatUrl(baseUrl: string): string {
   return `${apiBase}/api/chat`;
 }
 
-export function createOllamaStreamFn(baseUrl: string): StreamFn {
+export function createOllamaStreamFn(
+  baseUrl: string,
+  defaultHeaders?: Record<string, string>,
+): StreamFn {
   const chatUrl = resolveOllamaChatUrl(baseUrl);
 
   return (model, context, options) => {
@@ -440,6 +443,7 @@ export function createOllamaStreamFn(baseUrl: string): StreamFn {
 
         const headers: Record<string, string> = {
           "Content-Type": "application/json",
+          ...defaultHeaders,
           ...options?.headers,
         };
         if (options?.apiKey) {
diff --git a/src/agents/pi-embedded-runner/run/attempt.ts b/src/agents/pi-embedded-runner/run/attempt.ts
index 2f65542a171..c34043a5351 100644
--- a/src/agents/pi-embedded-runner/run/attempt.ts
+++ b/src/agents/pi-embedded-runner/run/attempt.ts
@@ -1022,7 +1022,7 @@ export async function runEmbeddedAttempt(
           modelBaseUrl,
           providerBaseUrl,
         });
-        activeSession.agent.streamFn = createOllamaStreamFn(ollamaBaseUrl);
+        activeSession.agent.streamFn = createOllamaStreamFn(ollamaBaseUrl, params.model.headers);
       } else if (params.model.api === "openai-responses" && params.provider === "openai") {
         const wsApiKey = await params.authStorage.getApiKey(params.provider);
         if (wsApiKey) {