diff --git a/release/scripts/freestyle/modules/freestyle/chainingiterators.py b/release/scripts/freestyle/modules/freestyle/chainingiterators.py
index 080919f6bc3..5cd0dfeff59 100644
--- a/release/scripts/freestyle/modules/freestyle/chainingiterators.py
+++ b/release/scripts/freestyle/modules/freestyle/chainingiterators.py
@@ -24,6 +24,8 @@ chaining iterators in Python
 """
 
 __all__ = (
+    "ChainPredicateIterator",
+    "ChainSilhouetteIterator",
     "pyChainSilhouetteIterator",
     "pyChainSilhouetteGenericIterator",
     "pyExternalContourChainingIterator",