diff --git a/NEWS.md b/NEWS.md
index 5c130547c7b78..7b50874313bee 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -43,6 +43,8 @@ Standard library changes
 * Added keyword arguments `rtol`, `atol` to `pinv` and `nullspace` ([#29998]).
 * `UniformScaling` instances are now callable such that e.g. `I(3)` will produce a `Diagonal` matrix ([#30298]).
 * Eigenvalues λ of general matrices are now sorted lexicographically by (Re λ, Im λ) ([#21598]).
+* `one` for structured matrices (`Diagonal`, `Bidiagonal`, `Tridiagonal`, `Symtridiagonal`) now preserves
+  structure and type. ([#29777])
 
 #### SparseArrays