diff --git a/lua/cmp/config/compare.lua b/lua/cmp/config/compare.lua
index 6458d18..4b4fadc 100644
--- a/lua/cmp/config/compare.lua
+++ b/lua/cmp/config/compare.lua
@@ -204,7 +204,7 @@ compare.scopes = setmetatable({
         for _, definition in pairs(definitions) do
           if s <= definition.node:start() and definition.node:end_() <= e then
             if scope:id() == locals.containing_scope(definition.node, buf):id() then
-              local text = vim.treesitter.query.get_node_text(definition.node)[1]
+              local text = vim.treesitter.query.get_node_text(definition.node, buf) or ''
               if not self.scopes_map[text] then
                 self.scopes_map[text] = depth
               end