diff --git a/debian/changelog b/debian/changelog
index 6ee70f7..4d819c5 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -4,6 +4,9 @@
   * New upstream release (5.20.3).
   * Update build-deps with the info from cmake.
   * Update list of installed files.
+
+  [ Alexander Volkov ]
+  * Set CAP_WAKE_ALARM capability for powerdevil in postinst.
 
  -- Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>  Tue, 17 Nov 2020 10:43:46 +0900
 
diff --git a/debian/control b/debian/control
index e22e83f..a1da013 100644
--- a/debian/control
+++ b/debian/control
@@ -70,6 +70,7 @@
 Package: powerdevil
 Architecture: any
 Depends: powerdevil-data (= ${source:Version}),
+         libcap2-bin [linux-any],
          ${misc:Depends},
          ${shlibs:Depends},
 Description: Global power saver settings.
diff --git a/debian/powerdevil.postinst.in b/debian/powerdevil.postinst.in
new file mode 100644
index 0000000..7ede553
--- /dev/null
+++ b/debian/powerdevil.postinst.in
@@ -0,0 +1,18 @@
+#!/bin/sh
+
+set -e
+
+if [ "$1" = configure ]; then
+    # Set the capabilities
+    if command -v setcap > /dev/null && \
+       setcap "CAP_WAKE_ALARM=+ep" \
+            "/usr/lib/#DEB_HOST_MULTIARCH#/libexec/org_kde_powerdevil"; then
+        echo "Sucessfully set capabilities for powerdevil"
+    else
+        echo "Failed to set capabilities for powerdevil" >&2
+    fi
+fi
+
+#DEBHELPER#
+
+exit 0
diff --git a/debian/rules b/debian/rules
index 1b794db..338b841 100755
--- a/debian/rules
+++ b/debian/rules
@@ -1,6 +1,8 @@
 #!/usr/bin/make -f
 
 export DEB_BUILD_MAINT_OPTIONS = hardening=+all
+
+DEB_HOST_MULTIARCH ?= $(shell dpkg-architecture -qDEB_HOST_MULTIARCH)
 
 libpkgs_gen_strict_local_shlibs = $(libpkgs_all_packages)
 include /usr/share/pkg-kde-tools/qt-kde-team/2/library-packages.mk
@@ -10,3 +12,8 @@
 
 override_dh_gencontrol-arch: libpkgs_gen_strict_local_shlibs
 	dh_gencontrol -a
+
+override_dh_installdeb:
+	sed 's/#DEB_HOST_MULTIARCH#/$(DEB_HOST_MULTIARCH)/' \
+	    debian/powerdevil.postinst.in > debian/powerdevil.postinst
+	dh_installdeb