diff --git a/README.md b/README.md
index 45a2be7..663a764 100644
--- a/README.md
+++ b/README.md
@@ -91,12 +91,14 @@ Usage:
 
     statoolinfos list file                   <logfilesorconfigfile>  display http access log files
     statoolinfos list log      [-bot|-nobot] <logfilesorconfigfile>  display http access log lines
-    statoolinfos list ip       [-bot|-nobot] <logfiles>              generate ip list from http log file
-    statoolinfos list ua       [-bot|-nobot] <logfiles>              generate user agent list from http log file
-    statoolinfos list visitor  [-bot|-nobot] <logfiles>              generate visitors (ip+ua) list from http log file
-    statoolinfos stat ip       [-bot|-nobot] <logfiles>              generate stats about ip from http log file
-    statoolinfos stat ua       [-bot|-nobot] <logfiles>              generate stats about user agent from http log file
-    statoolinfos stat visitor  [-bot|-nobot] <logfiles>              generate stats about visitor (ip+ua) from http log file
+    statoolinfos list ip       [-bot|-nobot] <logfilesorconfigfile>  generate ip list from http log file
+    statoolinfos list ua       [-bot|-nobot] <logfilesorconfigfile>  generate user agent list from http log file
+    statoolinfos list visitor  [-bot|-nobot] <logfilesorconfigfile>  generate visitors (ip+ua) list from http log file
+    statoolinfos stat ip       [-bot|-nobot] <logfilesorconfigfile>  generate stats about ip from http log file
+    statoolinfos stat ua       [-bot|-nobot] <logfilesorconfigfile>  generate stats about user agent from http log file
+    statoolinfos stat visitor  [-bot|-nobot] <logfilesorconfigfile>  generate stats about visitor (ip+ua) from http log file
+    statoolinfos list errfile                <logfilesorconfigfile>  display http error log files
+    statoolinfos list errlog                 <logfilesorconfigfile>  display http error log lines
 ```