diff --git a/config.lib b/config.lib
index 9d7006336d..abbceb323d 100644
--- a/config.lib
+++ b/config.lib
@@ -829,9 +829,9 @@ check_params() {
 			revision=""
 			log 1 "checking revision... no detection"
 			log 1 "WARNING: there is no means to determine the version."
-			log 1 "WARNING: please use a subversion or git checkout of OpenTTD."
-			log 1 "WARNING: this version is only allowed by game servers that"
-			log 1 "WARNING: have been compiled without version detection."
+			log 1 "WARNING: please use a subversion, mercurial, or git checkout of OpenTTD."
+			log 1 "WARNING: you can only join game servers that have been compiled without"
+			log 1 "WARNING:   version detection."
 			log 1 "WARNING: there is a great chance you desync."
 			log 1 "WARNING: USE WITH CAUTION!"