diff --git a/etl/epc/DataProcessor.py b/etl/epc/DataProcessor.py
index 5a210d9f..af55535c 100644
--- a/etl/epc/DataProcessor.py
+++ b/etl/epc/DataProcessor.py
@@ -702,7 +702,7 @@ class EPCDataProcessor:
         self.data = self.data[self.data["PROPERTY_TYPE"] != IGNORED_PROPERTY_TYPES]
 
         # We remove EPCs where the tenure is unknown, but is usually an indicator of a new build
-        self.data = self.data[self.data["TENURE"] != IGNORED_TENURES]
+        self.data = self.data[~self.data["TENURE"].isin(IGNORED_TENURES)]
 
     def clean_multi_glaze_proportion(self, ignore_step: bool = False) -> None:
         """