diff --git a/docs/api/messages.md b/docs/api/messages.md
index 0fce04e..3b9724b 100644
--- a/docs/api/messages.md
+++ b/docs/api/messages.md
@@ -48,7 +48,7 @@ Heartbeat messages are posted to the heartbeat channel periodically.
 | code_sequence   | int                   | Code sequence      |
 | abi_sequence    | int                   | ABI sequence       |
 
-### PermisssionLevel
+### PermissionLevel
 
 | Field      | Datatype | Description                      |
 | ---------- | -------- | -------------------------------- |