diff --git a/graphrag/config/models/graph_rag_config.py b/graphrag/config/models/graph_rag_config.py
index cac321f01b..3882d31e57 100644
--- a/graphrag/config/models/graph_rag_config.py
+++ b/graphrag/config/models/graph_rag_config.py
@@ -295,7 +295,7 @@ def _validate_vector_store_db_uri(self) -> None:
         """Validate the vector store configuration."""
         for store in self.vector_store.values():
             if store.type == VectorStoreType.LanceDB:
-                if not store.db_uri or store.db_uri.strip == "":
+                if not store.db_uri or store.db_uri.strip() == "":
                     msg = "Vector store URI is required for LanceDB. Please rerun `graphrag init` and set the vector store configuration."
                     raise ValueError(msg)
                 store.db_uri = str((Path(self.root_dir) / store.db_uri).resolve())