diff --git a/src/msha/handlers/function.handler.ts b/src/msha/handlers/function.handler.ts
index 66bc6158c..668a1bf26 100644
--- a/src/msha/handlers/function.handler.ts
+++ b/src/msha/handlers/function.handler.ts
@@ -70,6 +70,8 @@ export function handleFunctionRequest(req: http.IncomingMessage, res: http.Serve
     res,
     {
       target,
+      // Set the host header to match the remote API host.
+      changeOrigin: true,
     },
     onConnectionLost(req, res, target, "↳")
   );