diff --git a/user-doc/Intro.txt b/user-doc/Intro.txt
index e5a2d75e3609a7925b9c527d9e07ea44d9961351..8aeb1a54137af1d75d4a9e687300fa2c1d81621a 100644
--- a/user-doc/Intro.txt
+++ b/user-doc/Intro.txt
@@ -36,6 +36,7 @@ As far as we know, the following MD codes can be used with PLUMED out of the box
 - [IPHIGENIE](http://sourceforge.net/projects/iphigenie/).
 - [AceMD](http://www.multiscalelab.org/acemd/).
 - [OpenMM](http://openmm.org), using the [openmmp-plumed plugin](http://github.com/peastman/openmm-plumed).
+- [DL_POLY4](http://www.scd.stfc.ac.uk//research/app/ccg/software/DL_POLY/44516.aspx).
 
 Please refer to the documentation of the MD code to know how to use it with the latest PLUMED release.
 If you maintain another MD code that is PLUMED-ready let us know and we will add it to this list.