diff --git a/src/init.lua b/src/init.lua
index 9a73e33..86e3bfa 100644
--- a/src/init.lua
+++ b/src/init.lua
@@ -33,9 +33,8 @@ irc.DEBUG = ((mt_irc.debug and true) or false);
 if (not mt_irc.server_nick) then
     local pr = PseudoRandom(os.time());
     -- Workaround for bad distribution in minetest PRNG implementation.
-    local fmt = "minetest-%02X%02X%02X%02X";
+    local fmt = "minetest-%02X%02X%02X";
     mt_irc.server_nick = fmt:format(
-        pr:next(0, 255),
         pr:next(0, 255),
         pr:next(0, 255),
         pr:next(0, 255)