diff --git a/4B.md b/4B.md
index c7ee7e9f..aa5fa8c2 100644
--- a/4B.md
+++ b/4B.md
@@ -12,7 +12,7 @@ This NIP defines how to accomplish nsec transfer from client to client including
 
 - **Source client**: A client that holds the user's nsec.
 - **Destination client**: A client that doesn't have the user's nsec and wants it.
-- **Ephemeral pubkey**: A pubkey of a kay pair generated for one-time use only.
+- **Ephemeral pubkey**: A pubkey of a key pair generated for one-time use only.
 
 ## Flow