diff --git a/README.md b/README.md
index fb68c70..3dca204 100644
--- a/README.md
+++ b/README.md
@@ -82,7 +82,7 @@ assert_relative_eq!(big, 703.2270331047702, max_relative = 4e-16);
 assert_relative_eq!(tiny, -715.7695669234213, max_relative = 4e-16);
 ```
 
-Importing the `LambertW` trait lets you call the functions with postfix notations:
+Importing the `LambertW` trait lets you call the functions with postfix notation:
 
 ```rust
 use lambert_w::LambertW;
diff --git a/src/lib.rs b/src/lib.rs
index 7f14dc7..7948207 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -89,7 +89,7 @@ assert_relative_eq!(tiny, -715.7695669234213, max_relative = 4e-16);
 "#
 )]
 //!
-//! Importing the [`LambertW`] trait lets you call the functions with postfix notations:
+//! Importing the [`LambertW`] trait lets you call the functions with postfix notation:
 //! 
 #![cfg_attr(
     feature = "50bits",