diff --git a/src/doc/ndarray_for_numpy_users/mod.rs b/src/doc/ndarray_for_numpy_users/mod.rs
index 7eaaf7d01..5ac15e300 100644
--- a/src/doc/ndarray_for_numpy_users/mod.rs
+++ b/src/doc/ndarray_for_numpy_users/mod.rs
@@ -605,7 +605,7 @@
 //!
 //! </td><td>
 //!
-//! `a.mapv(|x| f32::from(x))`
+//! `a.mapv(f32::from)`
 //!
 //! </td><td>
 //!
@@ -619,7 +619,7 @@
 //!
 //! </td><td>
 //!
-//! `a.mapv(|x| i32::from(x))`
+//! `a.mapv(i32::from)`
 //!
 //! </td><td>
 //!