diff --git a/tools/install.sh b/tools/install.sh
index d907b795c..5234c17a4 100755
--- a/tools/install.sh
+++ b/tools/install.sh
@@ -473,7 +473,7 @@ EOF
   # be prompted for the password either way, so this shouldn't cause any issues.
   #
   if user_can_sudo; then
-    sudo -k >/dev/null 2>&1         # -k forces the password prompt
+    sudo -k >/dev/null 2>&1 || true # -k forces the password prompt when supported
     sudo chsh -s "$zsh" "$USER"
   else
     chsh -s "$zsh" "$USER"          # run chsh normally