diff --git a/autoload/tagbar.vim b/autoload/tagbar.vim
index f8afe5d..ec9ec6c 100644
--- a/autoload/tagbar.vim
+++ b/autoload/tagbar.vim
@@ -976,6 +976,9 @@ function! s:CreateAutocommands() abort
         autocmd BufDelete,BufUnload,BufWipeout * call
                     \ s:known_files.rm(fnamemodify(expand('<afile>'), ':p'))
 
+        autocmd QuickFixCmdPre  * let s:tagbar_qf_active = 1
+        autocmd QuickFixCmdPost * unlet s:tagbar_qf_active
+
         autocmd VimEnter * call s:CorrectFocusOnStartup()
     augroup END
 
@@ -3185,6 +3188,12 @@ endfunction
 function! s:AutoUpdate(fname, force) abort
     call s:LogDebugMessage('AutoUpdate called [' . a:fname . ']')
 
+    " This file is being loaded due to a quickfix command like vimgrep, so
+    " don't process it
+    if exists('s:tagbar_qf_active')
+        return
+    endif
+
     " Get the filetype of the file we're about to process
     let bufnr = bufnr(a:fname)
     let ftype = getbufvar(bufnr, '&filetype')