diff --git a/modules/programs/powerline-go.nix b/modules/programs/powerline-go.nix
index 0727a69c..a4cd233c 100644
--- a/modules/programs/powerline-go.nix
+++ b/modules/programs/powerline-go.nix
@@ -110,7 +110,7 @@ in {
     programs.bash.initExtra = ''
       function _update_ps1() {
         local old_exit_status=$?
-        PS1="$(${pkgs.powerline-go}/bin/powerline-go -error $? ${commandLineArguments})"
+        PS1="$(${pkgs.powerline-go}/bin/powerline-go -error $old_exit_status ${commandLineArguments})"
         ${cfg.extraUpdatePS1}
         return $old_exit_status
       }
diff --git a/tests/modules/programs/powerline-go/standard.nix b/tests/modules/programs/powerline-go/standard.nix
index 9788ce7d..b01fcb1a 100644
--- a/tests/modules/programs/powerline-go/standard.nix
+++ b/tests/modules/programs/powerline-go/standard.nix
@@ -22,7 +22,7 @@ with lib;
       assertFileExists home-files/.bashrc
       assertFileContains \
         home-files/.bashrc \
-        '/bin/powerline-go -error $? -modules nix-shell -newline -path-aliases \~/project/foo=prj-foo -ignore-repos /home/me/project1,/home/me/project2'
+        '/bin/powerline-go -error $old_exit_status -modules nix-shell -newline -path-aliases \~/project/foo=prj-foo -ignore-repos /home/me/project1,/home/me/project2'
     '';
   };
 }