diff --git a/ftplugin/ledger.vim b/ftplugin/ledger.vim
index b256296..59d3112 100644
--- a/ftplugin/ledger.vim
+++ b/ftplugin/ledger.vim
@@ -29,6 +29,7 @@ setlocal formatexpr=ledger#align_formatexpr(v:lnum,v:count)
 " on non-transaction blocks, see https://github.com/ledger/vim-ledger/issues/168.
 if b:ledger_dangerous_formatprg
   execute 'setlocal formatprg='.substitute(b:ledger_bin, ' ', '\\ ', 'g').'\ -f\ -\ print'
+  setlocal formatexpr=
 endif
 
 if !exists('current_compiler')