+%if %{with_modbus}
+%package modbus
+Summary: modbus plugin for collectd
+Group: System Environment/Daemons
+Requires: %{name}%{?_isa} = %{version}-%{release}
+BuildRequires: libmodbus-devel
+%description modbus
+The modbus plugin collects values from Modbus/TCP enabled devices
+%endif
+