diff --git a/src/pds/registrysweepers/utils/productidentifiers/pdslidvid.py b/src/pds/registrysweepers/utils/productidentifiers/pdslidvid.py
index 30c91c1..a637ca0 100644
--- a/src/pds/registrysweepers/utils/productidentifiers/pdslidvid.py
+++ b/src/pds/registrysweepers/utils/productidentifiers/pdslidvid.py
@@ -34,6 +34,9 @@ def __repr__(self):
         return f"PdsLidVid({str(self)})"
 
     def __eq__(self, other):
+        if not isinstance(other, PdsLidVid):
+            return False
+
         return self.lid == other.lid and self.vid == other.vid
 
     def __lt__(self, other: PdsLidVid):