autoload/lsp/completion.vim | 2 +-

diff --git a/autoload/lsp/completion.vim b/autoload/lsp/completion.vim
index bd6094a74be266572a3f5a4df5f799d4f21784e0..3d1c2be3de3db1c510337959d839cc5249a75025 100644
--- a/autoload/lsp/completion.vim
+++ b/autoload/lsp/completion.vim
@@ -538,7 +538,7 @@   endif
 
   var item = v:event.completed_item
   if item->has_key('user_data') && !item.user_data->empty()
-      if !item.user_data->has_key('documentation')
+      if item.user_data->type() == v:t_dict && !item.user_data->has_key('documentation')
 	lspserver.resolveCompletion(item.user_data)
       else
 	ShowCompletionDocumentation(item.user_data)