diff --git a/src/summary/summary/core/llm_service.py b/src/summary/summary/core/llm_service.py
index a3b04f54..d26d7ad8 100644
--- a/src/summary/summary/core/llm_service.py
+++ b/src/summary/summary/core/llm_service.py
@@ -141,4 +141,4 @@ class LLMService:
 
         except Exception as e:
             self._logger.exception("LLM call failed: %s", e)
-            raise LLMException("LLM call failed: {e}") from e
+            raise LLMException(f"LLM call failed: {e}") from e