diff --git a/.vimrc b/.vimrc
--- a/.vimrc
+++ b/.vimrc
@@ -128,7 +128,7 @@ command! SyntaxCompleteOn setl omnifunc=
 
 command! Mksession execute "mksession! " . v:this_session
 
-command! -nargs=+ -complete=file Tig      call tig#Tig(<f-args>)
+command! -nargs=* -complete=file Tig      call tig#Tig(<f-args>)
 command!                         TigBlame call tig#TigBlame()
 
 command! -nargs=+ -complete=file -bar Ag call vimrc#Ag(<q-args>)