diff --git a/src/ecoisundertaxon.c b/src/ecoisundertaxon.c
index f81edbd..31211e8 100644
--- a/src/ecoisundertaxon.c
+++ b/src/ecoisundertaxon.c
@@ -35,6 +35,8 @@ static void PrintHelp()
         PP      " has to be formated first by the ecoPCRFormat.py program located.\n");
         PP      " in the tools directory. Type the radical only, leaving out the extension\n");
         PP      "------------------------------------------\n\n");
+        PP		" https://www.grenoble.prabi.fr/trac/ecoPCR/wiki");
+        PP      "------------------------------------------\n\n");        
 }
 
 #undef PP