diff --git a/llama_stack/providers/inline/safety/llama_guard/llama_guard.py b/llama_stack/providers/inline/safety/llama_guard/llama_guard.py
index 1496074a9..bc4d9640c 100644
--- a/llama_stack/providers/inline/safety/llama_guard/llama_guard.py
+++ b/llama_stack/providers/inline/safety/llama_guard/llama_guard.py
@@ -267,7 +267,6 @@ class LlamaGuardShield:
                 event.event_type == ChatCompletionResponseEventType.progress
                 and event.delta.type == "text"
             ):
-                assert isinstance(event.delta.text, str)
                 content += event.delta.text
 
         content = content.strip()