diff --git a/autoload/firenvim.vim b/autoload/firenvim.vim
index f70e1d97..8b9a76e7 100644
--- a/autoload/firenvim.vim
+++ b/autoload/firenvim.vim
@@ -50,6 +50,25 @@ function! firenvim#hide_frame() abort
         call rpcnotify(firenvim#get_chan(), 'firenvim_hide_frame')
 endfunction
 
+" Asks the browser extension to write to the text area. Either two or no
+" arguments.
+" 1st arg: string to write
+" 2nd arg: position of the cursor
+function! firenvim#write(...) abort
+        let l:text = ''
+        let l:cursor = [0, 0]
+        if len(a:000) == 0
+                let l:text = nvim_buf_get_lines(0, 0, -1, 0)
+                let l:cursor = nvim_win_get_cursor(0)
+        elseif len(a:000) == 2
+                let l:text = a:0
+                let l:cursor = a:1
+        else
+                throw 'firenvim#write should be called either with 0 arguments or with 2 arguments (string, [number, number])'
+        endif
+        call rpcnotify(firenvim#get_chan(), 'firenvim_bufwrite', {'text': l:text, 'cursor': l:cursor})
+endfunction
+
 " Asks the browser extension to send one or multiple key events to the
 " underlying input field.
 function! firenvim#press_keys(...) abort
diff --git a/src/frame.ts b/src/frame.ts
index 80a10c67..c35db697 100644
--- a/src/frame.ts
+++ b/src/frame.ts
@@ -118,14 +118,7 @@ export const isReady = browser
                   group = group,
                   pattern = filename,
                   callback = function(ev)
-                    vim.fn.rpcnotify(
-                      channel,
-                      "firenvim_bufwrite",
-                      {
-                        text = vim.api.nvim_buf_get_lines(0, 0, -1, 0),
-                        cursor = vim.api.nvim_win_get_cursor(0)
-                      }
-                    )
+                    vim.fn["firenvim#write"]()
                   end
                 })
                 vim.api.nvim_create_autocmd("VimLeave", {