diff --git a/src/api/chainHead_unstable_follow.md b/src/api/chainHead_unstable_follow.md
index b55e4b9..b76f39f 100644
--- a/src/api/chainHead_unstable_follow.md
+++ b/src/api/chainHead_unstable_follow.md
@@ -399,4 +399,4 @@ The runtime is of type `invalid` if the JSON-RPC server considers the runtime as
 
 ## Possible errors
 
-- A JSON-RPC error with error code `-32100` can be generated if the JSON-RPC client has already opened 2 or more `chainHead_unstable_follow` subscriptions.
+- A JSON-RPC error with error code `-32800` can be generated if the JSON-RPC client has already opened 2 or more `chainHead_unstable_follow` subscriptions.