diff --git a/autoload/gitgutter/diff.vim b/autoload/gitgutter/diff.vim
index 170193b..47c9e9b 100644
--- a/autoload/gitgutter/diff.vim
+++ b/autoload/gitgutter/diff.vim
@@ -95,6 +95,7 @@ function! gitgutter#diff#run_diff(realtime, preserve_full_diff) abort
   let cmd .= g:gitgutter_git_executable
   if s:c_flag
     let cmd .= ' -c "diff.autorefreshindex=0"'
+    let cmd .= ' -c "diff.noprefix=false"'
   endif
   let cmd .= ' diff --no-ext-diff --no-color -U0 '.g:gitgutter_diff_args.' '