diff --git a/generic_rag/graphs/ret_gen.py b/generic_rag/graphs/ret_gen.py
index 9a05349..280f8cb 100644
--- a/generic_rag/graphs/ret_gen.py
+++ b/generic_rag/graphs/ret_gen.py
@@ -61,7 +61,6 @@ class RetGenLangGraph:
             return pdf_sources
 
         for doc in self.last_retrieved_docs:
-            source_candidate = doc.metadata["source"]
             if "source" in doc.metadata and Path(doc.metadata["source"]).suffix.lower() == ".pdf":
                 source = doc.metadata["source"]
             else: