diff --git a/scoutr/providers/base/filtering.py b/scoutr/providers/base/filtering.py
index 4781c77..56d7088 100644
--- a/scoutr/providers/base/filtering.py
+++ b/scoutr/providers/base/filtering.py
@@ -40,6 +40,7 @@ class Filtering:
         OPERATION_LESS_THAN,
         OPERATION_GREATER_THAN_EQUAL,
         OPERATION_LESS_THAN_EQUAL,
+        OPERATION_LENGTH,
         OPERATION_LENGTH_GREATER_THAN,
         OPERATION_LENGTH_GREATER_THAN_EQUAL,
         OPERATION_LENGTH_LESS_THAN,