diff --git a/common/lib/dataset.py b/common/lib/dataset.py
index 534a9b6de..8f8353992 100644
--- a/common/lib/dataset.py
+++ b/common/lib/dataset.py
@@ -819,7 +819,7 @@ def get_columns(self):
 			# no file to get columns from
 			return False
 
-		if (self.get_results_path().suffix.lower() == ".csv") or (self.get_results_path().suffix.lower() == ".ndjson" and self.get_own_processor().map_item_method_available(dataset=self)):
+		if (self.get_results_path().suffix.lower() == ".csv") or (self.get_results_path().suffix.lower() == ".ndjson" and self.get_own_processor() is not None and self.get_own_processor().map_item_method_available(dataset=self)):
 			return self.get_item_keys(processor=self.get_own_processor())
 		else:
 			# Filetype not CSV or an NDJSON with `map_item`