diff --git a/src/backend.lua b/src/backend.lua
index 0123759..190e008 100644
--- a/src/backend.lua
+++ b/src/backend.lua
@@ -47,6 +47,7 @@
 bAssert(config.self == nil, "Config is missing field `self`. Refer to documentation.")
 bAssert(config.name == nil, "Config is missing field `name`. Refer to documentation.")
 bAssert(utils.endsWith(config.name, ".kst"), "The configured krist name ends with .kst. Please remove this.")
+bAssert(not utils.endsWith(config.pkey, "-000"), "The configured krist privatekey is not in the correct format. It should be in kristwallet. If you are using KristWeb you can go to Wallets -> find your wallet -> Press \"..\" -> Wallet info -> Private key -> Reveal")
 
 if config.messages == nil then
   config.messages = {