diff --git a/Source/IGListKit/IGListAdapterDataSource.h b/Source/IGListKit/IGListAdapterDataSource.h
index 4f868e181..61157ba6a 100644
--- a/Source/IGListKit/IGListAdapterDataSource.h
+++ b/Source/IGListKit/IGListAdapterDataSource.h
@@ -22,6 +22,7 @@ NS_ASSUME_NONNULL_BEGIN
 /**
  Implement this protocol to provide data to an `IGListAdapter`.
  */
+NS_SWIFT_UI_ACTOR
 NS_SWIFT_NAME(ListAdapterDataSource)
 @protocol IGListAdapterDataSource <NSObject>
 
diff --git a/Source/IGListKit/IGListSingleSectionController.h b/Source/IGListKit/IGListSingleSectionController.h
index b3984a56d..0f63a5901 100644
--- a/Source/IGListKit/IGListSingleSectionController.h
+++ b/Source/IGListKit/IGListSingleSectionController.h
@@ -43,6 +43,7 @@ typedef CGSize (^IGListSingleSectionCellSizeBlock)(id item, id<IGListCollectionC
 /**
  A delegate that can receive selection events on an `IGListSingleSectionController`.
  */
+NS_SWIFT_UI_ACTOR
 NS_SWIFT_NAME(ListSingleSectionControllerDelegate)
 @protocol IGListSingleSectionControllerDelegate <NSObject>