diff --git a/book/src/terminology.md b/book/src/terminology.md
index 5ce4e5abb2..5286d0b512 100644
--- a/book/src/terminology.md
+++ b/book/src/terminology.md
@@ -99,7 +99,7 @@ in a [transaction](#instruction).
 
 #### keypair
 
-A [public key](#public-key) and coesponding [secret key](#secret-key).
+A [public key](#public-key) and corresponding [secret key](#secret-key).
 
 #### lamport