diff --git a/src/ecofind.c b/src/ecofind.c
index 9770659..0ccaf6e 100644
--- a/src/ecofind.c
+++ b/src/ecofind.c
@@ -54,7 +54,7 @@ void gettaxidparents(int32_t taxid, ecotaxonomy_t *taxonomy)
 static void ExitUsage(stat)
         int stat;
 {
-        PP      "usage: ecofind [-d database] [-h] <taxon name pattern> ... \n");
+        PP      "usage: ecofind [-d database] [-h] [-t taxid] <taxon name pattern> ... \n");
         PP      "type \"ecofind -h\" for help\n");
         if (stat)
             exit(stat);
@@ -84,6 +84,8 @@ static void PrintHelp()
         PP		"	program located in the tools directory.\n");
         PP		"	Write the database radical without any extension.\n\n");
         PP		"-h	: [H]elp - print <this> help\n\n");
+        PP      "-t : [T]axonomic id. Specifiying this option will display");
+        PP      "   all parents parent information for the given taxid.");
         PP      "<taxon> name pattern bearing regular expressions\n\n");
         PP      "------------------------------------------\n");
         PP		" https://www.grenoble.prabi.fr/trac/ecoPCR/wiki\n");