diff --git a/lib/roken/getarg.h b/lib/roken/getarg.h
index c5d8b0e05..2f5ddc6b1 100644
--- a/lib/roken/getarg.h
+++ b/lib/roken/getarg.h
@@ -49,6 +49,7 @@ struct getargs{
     enum { arg_integer, arg_string, arg_flag, arg_negative_flag } type;
     void *value;
     const char *help;
+    const char *arg_help;
 };
 
 enum {