diff --git a/autoload/lsp.vim b/autoload/lsp.vim
index 02002b39c..c6e4dbe2d 100644
--- a/autoload/lsp.vim
+++ b/autoload/lsp.vim
@@ -214,6 +214,10 @@ function! s:on_text_document_did_open() abort
     endfor
 endfunction
 
+function! lsp#activate() abort
+  call s:on_text_document_did_open()
+endfunction
+
 function! s:on_text_document_did_save() abort
     let l:buf = bufnr('%')
     if getbufvar(l:buf, '&buftype') ==# 'terminal' | return | endif