diff --git a/backend/app/services/llm_service.py b/backend/app/services/llm_service.py
index 9a0504e9..75ac3739 100755
--- a/backend/app/services/llm_service.py
+++ b/backend/app/services/llm_service.py
@@ -76,7 +76,7 @@ class LLMService:
         # Try to extract from output structure
         if hasattr(response, 'output') and response.output:
             for item in response.output:
-                if hasattr(item, 'content'):
+                if hasattr(item, 'content') and item.content is not None:
                     for content in item.content:
                         if hasattr(content, 'text'):
                             result += content.text