diff --git a/mcp/tools/export.py b/mcp/tools/export.py
index fc7d9cc7..22d5810c 100644
--- a/mcp/tools/export.py
+++ b/mcp/tools/export.py
@@ -104,7 +104,7 @@ def handle_get_provenance(args: dict) -> dict:
         # Try ProvenanceTracker first
         try:
             from semantica.kg import ProvenanceTracker
-            tracker = ProvenanceTracker(graph_store=graph)
+            tracker = ProvenanceTracker(graph)
             records = tracker.get_provenance(node_id)
             result = records if isinstance(records, list) else list(records)
         except (ImportError, AttributeError):