diff --git a/doc/signify.txt b/doc/signify.txt
index 6d0ede9..20ae84f 100644
--- a/doc/signify.txt
+++ b/doc/signify.txt
@@ -239,6 +239,7 @@ People who contributed to sy. Format: Person (Github account)
 Jeremy Mack     (mutewinter)
 Chong Li        (chongli)
 Robin Munn      (rmunn)
+Martin Hoch     (rtwo)
 
 
 ==============================================================================
diff --git a/plugin/signify.vim b/plugin/signify.vim
index 2929b60..afb6b75 100644
--- a/plugin/signify.vim
+++ b/plugin/signify.vim
@@ -313,7 +313,7 @@ endfunction
 "  Functions -> s:repo_get_diff_cvs  {{{2
 function! s:repo_get_diff_cvs(path) abort
   if executable('cvs')
-    let diff = system('cvs diff -U0 -- '. a:path .' 2>&1 | grep --color=never "^@@ "')
+    let diff = system('cd '. fnameescape(fnamemodify(a:path, ':h')) .' && cvs diff -U0 -- '. fnameescape(fnamemodify(a:path, ':t')) .' | grep --color=never "^@@ "')
     return v:shell_error ? '' : diff
   endif
 endfunction