diff --git a/powerdevil-5.21.5-systemd-248.patch b/powerdevil-5.21.5-systemd-248.patch
new file mode 100644
index 0000000..fa07d83
--- /dev/null
+++ b/powerdevil-5.21.5-systemd-248.patch
@@ -0,0 +1,34 @@
+From d7c1181a5736bc5c6b2585fb0df9065510efcd7c Mon Sep 17 00:00:00 2001
+From: Yaroslav Sidlovsky <zawertun@gmail.com>
+Date: Wed, 5 May 2021 14:32:32 +0300
+Subject: [PATCH] GetSessionByPID DBUS call always fails on newer systemd
+ versions
+
+GetSessionByPID returns this error:
+```
+Error org.freedesktop.login1.NoSessionForPID: PID 2469 does not belong to any known session
+```
+So instead we will get session by calling GetSession("auto").
+Tested on Fedora, should also work on openSUSE & KDE Neon.
+
+BUG: 433408
+---
+ daemon/powerdevilpolicyagent.cpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/daemon/powerdevilpolicyagent.cpp b/daemon/powerdevilpolicyagent.cpp
+index 653d1eef..d3993d78 100644
+--- a/daemon/powerdevilpolicyagent.cpp
++++ b/daemon/powerdevilpolicyagent.cpp
+@@ -236,7 +236,7 @@ void PolicyAgent::onSessionHandlerRegistered(const QString & serviceName)
+             return;
+         }
+ 
+-        QDBusPendingReply<QDBusObjectPath> session = m_managerIface.data()->asyncCall(QLatin1String("GetSessionByPID"), (quint32) QCoreApplication::applicationPid());
++        QDBusPendingReply<QDBusObjectPath> session = m_managerIface.data()->asyncCall(QLatin1String("GetSession"), QLatin1String("auto"));
+         session.waitForFinished();
+ 
+         if (!session.isValid()) {
+-- 
+GitLab
+
diff --git a/powerdevil.spec b/powerdevil.spec
index 54f7705..d28f86e 100644
--- a/powerdevil.spec
+++ b/powerdevil.spec
@@ -2,7 +2,7 @@
 
 Name:          powerdevil
 Version:       5.21.5
-Release:       1mamba
+Release:       2mamba
 Summary:       KDE Plasma 5 power management
 Group:         Graphical Desktop/Applications/Configuration
 Vendor:        openmamba
@@ -11,14 +11,14 @@ Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           https://www.kde.org
 Source:        https://download.kde.org/stable/plasma/%{plasmaver}/powerdevil-%{version}.tar.xz
 Patch0:        powerdevil-5.19.5-libddcutil-0.9.9.patch
+Patch1:        powerdevil-5.21.5-systemd-248.patch
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
-BuildRequires: ldconfig
 BuildRequires: libbluez-qt-devel
 BuildRequires: libddcutil-devel
 BuildRequires: libgcc
-BuildRequires: libkactivities5-devel
+BuildRequires: libkactivities-devel
 BuildRequires: libkauth-devel
 BuildRequires: libkcodecs-devel
 BuildRequires: libkcompletion-devel
@@ -38,6 +38,7 @@ BuildRequires: libkscreen-devel
 BuildRequires: libkservice-devel
 BuildRequires: libkwayland-devel
 BuildRequires: libkwidgetsaddons-devel
+BuildRequires: libkwindowsystem-devel
 BuildRequires: libkxmlgui-devel
 BuildRequires: libnetworkmanager-qt5-devel
 BuildRequires: libplasma-workspace-devel
@@ -68,6 +69,7 @@ This package contains shared libraries for %{name}.
 %prep
 %setup -q
 #%patch0 -p1
+%patch1 -p1
 
 %build
 %cmake_kde5 -d build \
@@ -112,6 +114,9 @@ This package contains shared libraries for %{name}.
 %{_libexecdir}/org_kde_powerdevil
 
 %changelog
+* Mon May 10 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 5.21.5-2mamba
+- patched to fix power button actions, see https://bugs.kde.org/show_bug.cgi?id=433408
+
 * Wed May 05 2021 Automatic Build System <autodist@mambasoft.it> 5.21.5-1mamba
 - automatic version update by autodist