diff --git a/bitcoin/src/crypto/ecdsa.rs b/bitcoin/src/crypto/ecdsa.rs
index e982e522..167afcb6 100644
--- a/bitcoin/src/crypto/ecdsa.rs
+++ b/bitcoin/src/crypto/ecdsa.rs
@@ -2,7 +2,7 @@
 
 //! ECDSA Bitcoin signatures.
 //!
-//! This module provides ECDSA signatures used Bitcoin that can be roundtrip (de)serialized.
+//! This module provides ECDSA signatures used by Bitcoin that can be roundtrip (de)serialized.
 
 use core::str::FromStr;
 use core::{fmt, iter};