diff --git a/07.md b/07.md
index 12ae6478..71c1a77c 100644
--- a/07.md
+++ b/07.md
@@ -20,6 +20,7 @@ Aside from these two basic above, the following functions can also be implemente
 async window.nostr.getRelays(): { [url: string]: {read: boolean, write: boolean} } // returns a basic map of relay urls to relay policies
 async window.nostr.nip04.encrypt(pubkey, plaintext): string // returns ciphertext and iv as specified in nip-04 (deprecated)
 async window.nostr.nip04.decrypt(pubkey, ciphertext): string // takes ciphertext and iv as specified in nip-04 (deprecated)
+async window.nostr.signString(string): string // returns a signature on an arbitrary string
 ```
 
 ### Implementation