diff --git a/collectd.changes b/collectd.changes
index 24de540..61dd2bc 100644
--- a/collectd.changes
+++ b/collectd.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Sun Feb 19 23:36:46 UTC 2012 - pascal.bleser@opensuse.org
+
+- add modbus support
+
 -------------------------------------------------------------------
 Sun Feb 19 17:07:34 UTC 2012 - pascal.bleser@opensuse.org
 
diff --git a/collectd.spec b/collectd.spec
index 64e98ff..f39e389 100644
--- a/collectd.spec
+++ b/collectd.spec
@@ -160,6 +160,7 @@ BuildRequires:  perl
 BuildRequires:  rrdtool
 BuildRequires:  sensors
 BuildRequires:  zlib-devel
+BuildRequires:  libmodbus-devel
 %if 0%{?suse_version} > 1020
 BuildRequires:  libdb-4_5-devel
 %else