X-Git-Url: https://git.octo.it/?p=collectd.git;a=blobdiff_plain;f=README;fp=README;h=811c594cae9bd4748b1fbc0cd3b94e6be7bec805;hp=e8b7241b1f60a397a1d9f278a25571c9d1ad4c74;hb=0eff156c7816507fa1865b76e948574dd320fae0;hpb=19808b4489b7e096fe4b53446f33d917f0e16438

diff --git a/README b/README
index e8b7241b..811c594c 100644
--- a/README
+++ b/README
@@ -573,8 +573,10 @@ Prerequisites
     <http://tangent.org/552/libmemcached.html>
 
   * libmodbus (optional)
-    Used by the `modbus' plugin to communicate with Modbus/TCP devices.
-    <https://launchpad.net/libmodbus>
+    Used by the “modbus” plugin to communicate with Modbus/TCP devices. The
+    “modbus” plugin works with version 2.0.3 of the library – due to frequent
+    API changes other versions may or may not compile cleanly.
+    <http://www.libmodbus.org/>
 
   * libmysqlclient (optional)
     Unsurprisingly used by the `mysql' plugin.