diff --git a/autoload/vimtex/fold/bib.vim b/autoload/vimtex/fold/bib.vim
index cbc927c303..4edcf12318 100644
--- a/autoload/vimtex/fold/bib.vim
+++ b/autoload/vimtex/fold/bib.vim
@@ -21,7 +21,7 @@ endfunction
 
 function! vimtex#fold#bib#level(lnum) abort " {{{1
   " Handle blank lines
-  if empty(trim(getline(a:lnum)))
+  if empty(vimtex#util#trim(getline(a:lnum)))
     if a:lnum == 1 | return 0 | endif
 
     let l:prev_level = vimtex#fold#bib#level(a:lnum - 1)
diff --git a/autoload/vimtex/parser/bib.vim b/autoload/vimtex/parser/bib.vim
index e722559fc1..2fe299ebbe 100644
--- a/autoload/vimtex/parser/bib.vim
+++ b/autoload/vimtex/parser/bib.vim
@@ -31,7 +31,7 @@ function! vimtex#parser#bib#parse_cheap(start_line, end_line, opts) abort " {{{1
   let l:entries = []
   let l:firstlines = filter(
         \ range(a:start_line, a:end_line),
-        \ {_, i -> trim(getline(i))[0] == "@"})
+        \ {_, i -> vimtex#util#trim(getline(i))[0] == "@"})
   let l:total_entries = len(l:firstlines)
   let l:entry_lines = map(l:firstlines, {idx, val -> [val,
         \ idx == l:total_entries - 1