diff --git a/src/runtime/node.c b/src/runtime/node.c
index 9a795f7d..ff9dc2ee 100644
--- a/src/runtime/node.c
+++ b/src/runtime/node.c
@@ -173,7 +173,7 @@ TSPoint ts_node_size_point(TSNode self) {
 }
 
 TSPoint ts_node_start_point(TSNode self) {
-  TSTree *tree = ts_node__tree(self);
+  const TSTree *tree = ts_node__tree(self);
   return ts_point_make(self.row + tree->padding_point.row, ts_tree_offset_column(tree));
 }