diff --git a/api/core/rag/index_processor/processor/paragraph_index_processor.py b/api/core/rag/index_processor/processor/paragraph_index_processor.py
index 3b42560fd6..5600b6360b 100644
--- a/api/core/rag/index_processor/processor/paragraph_index_processor.py
+++ b/api/core/rag/index_processor/processor/paragraph_index_processor.py
@@ -469,7 +469,7 @@ class ParagraphIndexProcessor(BaseIndexProcessor):
         if not isinstance(result, LLMResult):
             raise ValueError("Expected LLMResult when stream=False")
 
-        summary_content = getattr(result.message, "content", "")
+        summary_content = result.message.get_text_content()
         usage = result.usage
 
         # Deduct quota for summary generation (same as workflow nodes)