diff --git a/etl/epc_clean/epc_attributes/WallAttributes.py b/etl/epc_clean/epc_attributes/WallAttributes.py
index 09eac215..49252552 100644
--- a/etl/epc_clean/epc_attributes/WallAttributes.py
+++ b/etl/epc_clean/epc_attributes/WallAttributes.py
@@ -75,12 +75,19 @@ class WallAttributes(Definitions):
         'insulation_thickness', 'external_insulation', 'internal_insulation'
     ]
 
+    CORRECTIONS = {
+        "Granite or whin, as built, no insulation (assumed)": "Granite or whinstone, as built, no insulation (assumed)",
+    }
+
     def __init__(self, description: str):
         """
         :param description: Description of the walls.
         """
         self.description: str = description
 
+        if self.description in self.CORRECTIONS:
+            self.description = self.CORRECTIONS[self.description]
+
         self.welsh_translation_search()
 
         self.nodata = not description or description in self.DATA_ANOMALY_MATCHES