diff --git a/ch03.asciidoc b/ch03.asciidoc
index c0374cc..dbceacf 100644
--- a/ch03.asciidoc
+++ b/ch03.asciidoc
@@ -211,7 +211,7 @@ The timelock is usually measured in blocktime and can be up to 2016.
 On average, 2016 blocks represent or last two weeks (assuming a blocktime of 10 minutes as in the Bitcoin network).
 Within the timelock anyone who knows the revocation secret can spend the output even before the timelock is over.
 Alice and Bob know only one half each of the revocation secret.
-But if they share their half with the other channel partner, theh the other partner knows the full secret.
+But if they share their half with the other channel partner, then the other partner knows the full secret.
 In order to update the balance and receive a signature from Bob, Alice will have to share her half of the revocation secret of the current commitment transaction with Bob.
 
 Obviously, for every new update of the channel balance new revocation secrets have to be created and saved.