diff --git a/app/Main.hs b/app/Main.hs
index 1031fc17d..c7c36578a 100644
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -52,6 +52,7 @@ instance Storable TSNode where
 
 foreign import ccall "app/bridge.h ts_document_root_node_p" ts_document_root_node_p :: Ptr TSDocument -> Ptr TSNode -> IO ()
 foreign import ccall "prototype/External/tree-sitter/include/tree_sitter/runtime.h ts_node_p_name" ts_node_p_name :: Ptr TSNode -> Ptr TSDocument -> IO CString
+foreign import ccall "prototype/External/tree-sitter/include/tree_sitter/runtime.h ts_node_p_named_child_count" ts_node_p_named_child_count :: Ptr TSNode -> IO CSize
 
 main :: IO ()
 main = do