diff --git a/src/rabbit.erl b/src/rabbit.erl
index 2949d9a9f1..c8c814b6b8 100644
--- a/src/rabbit.erl
+++ b/src/rabbit.erl
@@ -242,7 +242,7 @@ print_banner() ->
                 {"log",          log_location(kernel)},
                 {"sasl log",     log_location(sasl)},
                 {"database dir", rabbit_mnesia:dir()}],
-    DescrLen = lists:max([length(K) || {K, V} <- Settings]),
+    DescrLen = lists:max([length(K) || {K, _V} <- Settings]),
     Format = "~-" ++ integer_to_list(DescrLen) ++ "s: ~s~n",
     lists:foreach(fun ({K, V}) -> io:format(Format, [K, V]) end, Settings),
     io:nl().