diff --git a/plugins/pii_filter/pii_filter.py b/plugins/pii_filter/pii_filter.py
index 69609c06e..35016804b 100644
--- a/plugins/pii_filter/pii_filter.py
+++ b/plugins/pii_filter/pii_filter.py
@@ -711,7 +711,7 @@ def _process_nested_data_for_pii(self, data: Any, path: str, all_detections: dic
                 all_detections[path] = detections
                 self.detection_count += sum(len(items) for items in detections.values())
                 has_detections = True
-
+                modified = True
                 if self.pii_config.log_detections:
                     logger.warning(f"PII detected in tool result at '{path}': {', '.join(detections.keys())}")