diff --git a/bin/plasma-phone.cmake b/bin/plasma-phone.cmake
index 3e3ba3ea..3746e417 100644
--- a/bin/plasma-phone.cmake
+++ b/bin/plasma-phone.cmake
@@ -42,6 +42,9 @@ dbus-send --session --print-reply --dest=org.freedesktop.DBus /org/freedesktop/D
 sleep 1
 paplay /usr/share/sounds/sitter/ohits.ogg &
 
+# start polkit authentication agent
+@CMAKE_INSTALL_FULL_LIBEXECDIR@/polkit-kde-authentication-agent-1 &
+
 # Start kscreen_backend_launcher manually so plasmashell can restart properly
 @CMAKE_INSTALL_FULL_LIBEXECDIR_KF5@/kscreen_backend_launcher --backend QScreen &