diff --git a/src/startup.lua b/src/startup.lua
index 9dd7a41..768c78f 100644
--- a/src/startup.lua
+++ b/src/startup.lua
@@ -29,7 +29,7 @@ shell.run("/brulijam/sync.lua")
 local hash = require("brulijam.lib.hash")
 if os.getComputerLabel() == nil then
   print("wuauw")
-  local labelMainPart = string.sub(hash.digestStr(os.getComputerID()), 1, 6)
+  local labelMainPart = string.sub(hash.digestStr(string.format(os.getComputerID())), 1, 6)
   os.setComputerLabel(labelPrefix .. "-" .. labelMainPart)
 end