diff --git a/gaboshlib.include b/gaboshlib.include
index fd3a4dd..7718d5f 100644
--- a/gaboshlib.include
+++ b/gaboshlib.include
@@ -49,3 +49,6 @@ function undirect(){ exec 2>&9; }
 function redirect(){ exec 2>&8; }
 trap "redirect;" DEBUG
 PROMPT_COMMAND='undirect;'
+
+# LANG for "." as decimal separator (and not e.g. in German ",")
+export LANG=en_US.UTF-8