diff -rup bash-4.3.30/variables.c bash-4.3.30-new/variables.c --- bash-4.3.30/variables.c 2014-10-01 09:57:51.000000000 -0700 +++ bash-4.3.30-new/variables.c 2017-04-05 15:03:25.036413199 -0700 @@ -495,7 +495,11 @@ initialize_shell_variables (env, privmod #endif set_if_not ("PS2", secondary_prompt); } - set_if_not ("PS4", "+ "); + + if (current_user.euid == 0) + bind_variable ("PS4", "+ ", 0); + else + set_if_not ("PS4", "+ "); /* Don't allow IFS to be imported from the environment. */ temp_var = bind_variable ("IFS", " \t\n", 0);