From c2282b0e73b7a0b4d5c5c2f67a3b7bba42141784 Mon Sep 17 00:00:00 2001
From: Sam Sykes <sams@speechmatics.com>
Date: Sun, 3 Aug 2025 22:08:22 +0100
Subject: [PATCH] Set `user_id` to "" (not `None`) for `RTVIProcessor`.

---
 src/pipecat/services/speechmatics/stt.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/pipecat/services/speechmatics/stt.py b/src/pipecat/services/speechmatics/stt.py
index d6c947d38..6859306d3 100644
--- a/src/pipecat/services/speechmatics/stt.py
+++ b/src/pipecat/services/speechmatics/stt.py
@@ -191,7 +191,7 @@ class SpeakerFragments:
             passive_format = active_format
         return {
             "text": self._format_text(active_format if self.is_active else passive_format),
-            "user_id": self.speaker_id,
+            "user_id": self.speaker_id or "",
             "timestamp": self.timestamp,
             "language": self.language,
             "result": [frag.result for frag in self.fragments],