diff --git a/plugin/cmp.lua b/plugin/cmp.lua
index 3711ae0..a07573c 100644
--- a/plugin/cmp.lua
+++ b/plugin/cmp.lua
@@ -80,13 +80,15 @@ vim.cmd [[command! CmpStatus lua require('cmp').status()]]
 
 vim.cmd [[doautocmd <nomodeline> User cmp#ready]]
 
-vim.on_key(function(keys)
-  if keys == vim.api.nvim_replace_termcodes('<C-c>', true, true, true) then
-    vim.schedule(function()
-      if not api.is_suitable_mode() then
-        require('cmp.utils.autocmd').emit('InsertLeave')
-      end
-    end)
-  end
-end, vim.api.nvim_create_namespace('cmp.plugin'))
+if vim.on_key then
+  vim.on_key(function(keys)
+    if keys == vim.api.nvim_replace_termcodes('<C-c>', true, true, true) then
+      vim.schedule(function()
+        if not api.is_suitable_mode() then
+          require('cmp.utils.autocmd').emit('InsertLeave')
+        end
+      end)
+    end
+  end, vim.api.nvim_create_namespace('cmp.plugin'))
+end