diff --git a/gammu.changes b/gammu.changes
index 8ed454f..b707733 100644
--- a/gammu.changes
+++ b/gammu.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Fri Oct 15 07:32:06 UTC 2021 - Johannes Segitz <jsegitz@suse.com>
+
+- Added hardening to systemd service(s) (bsc#1181400). Added patch(es):
+  * harden_gammu-smsd.service.patch
+
 -------------------------------------------------------------------
 Tue Apr  6 09:39:34 UTC 2021 - Martin Hauke <mardnh@gmx.de>
 
diff --git a/gammu.spec b/gammu.spec
index 0a011f8..904de70 100644
--- a/gammu.spec
+++ b/gammu.spec
@@ -31,6 +31,7 @@ Patch1:         gammu-remove-gplv3-files.patch
 Patch2:         0001-Enable-fPIE-pie.patch
 Patch3:         0001-Update-Python-scripts-to-Python-3.patch
 Patch4:         0001-Docs-Adjust-attributes-order-to-avoid-bugs-in-breath.patch
+Patch5:	harden_gammu-smsd.service.patch
 BuildRequires:  cmake >= 2.8
 BuildRequires:  doxygen
 BuildRequires:  gettext
@@ -189,6 +190,7 @@ This package contains the Gammu SMS daemon shared library.
 %patch2 -p1
 %patch3 -p1
 %patch4 -p1
+%patch5 -p1
 
 # GPL-3.0 licensed files, bnc#775397
 rm -rf contrib/sms-gammu2android
diff --git a/harden_gammu-smsd.service.patch b/harden_gammu-smsd.service.patch
new file mode 100644
index 0000000..86ee1a9
--- /dev/null
+++ b/harden_gammu-smsd.service.patch
@@ -0,0 +1,21 @@
+Index: gammu-1.42.0/contrib/init/gammu-smsd.service
+===================================================================
+--- gammu-1.42.0.orig/contrib/init/gammu-smsd.service
++++ gammu-1.42.0/contrib/init/gammu-smsd.service
+@@ -4,6 +4,16 @@ Documentation=man:gammu-smsd(1)
+ After=mysql.service postgresql.service network-online.target
+ 
+ [Service]
++# added automatically, for details please see
++# https://en.opensuse.org/openSUSE:Security_Features#Systemd_hardening_effort
++ProtectSystem=full
++ProtectHostname=true
++ProtectKernelTunables=true
++ProtectKernelModules=true
++ProtectKernelLogs=true
++ProtectControlGroups=true
++RestrictRealtime=true
++# end of automatic additions 
+ EnvironmentFile=-/etc/sysconfig/gammu-smsd
+ # Run daemon as root user
+ ExecStart=${CMAKE_INSTALL_FULL_BINDIR}/gammu-smsd --pid=/var/run/gammu-smsd.pid --daemon