diff --git a/.vimrc b/.vimrc
--- a/.vimrc
+++ b/.vimrc
@@ -234,10 +234,10 @@ if has('persistent_undo')
 endif
 
 if executable('rg')
-  set grepprg=rg\ --vimgrep
-  set grepformat=%f:%l:%c:%m,%f:%l%m,%f\ \ %l%m
+  let &grepprg    = "rg -S --vimgrep"
+  let &grepformat = "%f:%l:%c:%m,%f:%l%m,%f  %l%m"
 elseif executable('ag')
-  set grepprg=ag\ --vimgrep
+  let &grepprg = "ag --vimgrep"
   set grepformat^=%f:%l:%c:%m
 endif