diff --git a/collectd.changes b/collectd.changes
index a60f1b5..9c83c56 100644
--- a/collectd.changes
+++ b/collectd.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Jun 28 13:17:32 UTC 2021 - Matwey Kornilov <matwey.kornilov@gmail.com>
+
+- add modbus plugin
+
 -------------------------------------------------------------------
 Tue Feb 23 16:29:31 UTC 2021 - Reinhard Max <max@suse.com>
 
diff --git a/collectd.spec b/collectd.spec
index 78ace55..4c13dd9 100644
--- a/collectd.spec
+++ b/collectd.spec
@@ -109,6 +109,7 @@ BuildRequires:  pkgconfig(libiptc)
 BuildRequires:  pkgconfig(libmemcached)
 BuildRequires:  pkgconfig(libmicrohttpd)
 BuildRequires:  pkgconfig(libmnl)
+BuildRequires:  pkgconfig(libmodbus)
 BuildRequires:  pkgconfig(libmosquitto)
 BuildRequires:  pkgconfig(libnotify)
 BuildRequires:  pkgconfig(liboping)
@@ -294,6 +295,14 @@ Requires:       %{name} = %{version}-%{release}
 %description plugin-memcachec
 Optional %{name} plugin to sample memcached statistics.
 
+%package plugin-modbus
+Summary:        TCP Modbus Plugin for %{name}
+Group:          System/Monitoring
+Requires:       %{name} = %{version}-%{release}
+
+%description plugin-modbus
+Optional %{name} plugin to communicate with TCP Modbus devices.
+
 %package plugin-mqtt
 Summary:        MQTT Plugin for %{name}
 Group:          System/Monitoring
@@ -806,6 +815,10 @@ ln -s %{_sbindir}/service %{buildroot}%{_sbindir}/rc%{name}
 %{_libdir}/collectd/memcachec.so
 %{_libdir}/collectd/memcachec.la
 
+%files plugin-modbus
+%{_libdir}/collectd/modbus.so
+%{_libdir}/collectd/modbus.la
+
 %files plugin-mqtt
 %{_libdir}/collectd/mqtt.so
 %{_libdir}/collectd/mqtt.la