diff --git a/ChangeLog b/ChangeLog
index c471c0a1..c796b6af 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,6 @@
 2024-02-18  Dirk Eddelbuettel  <edd@debian.org>
 
-	* src/fastLm.cpp: Switch to RcppArmadillo/Lightest
+	* src/fastLm.cpp: Switch to RcppArmadillo/Lighter
 	* src/RcppArmadillo.cpp: Idem
 
 	* README.md: Update count to February 2024, update example, edits
diff --git a/README.md b/README.md
index d7317d05..ef3e25a6 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,7 @@ a good balance between speed and ease of use. It provides high-level syntax and
 Glad you asked. Here is a light-weight and fast implementation of linear regression:
 
 ```c++
-#include <RcppArmadillo/Lightest>
+#include <RcppArmadillo/Lighter>
 // [[Rcpp::depends(RcppArmadillo)]]
 
 // [[Rcpp::export]]
@@ -58,10 +58,10 @@ the file above to compile the function.  A version is also included in the
 package [as the `fastLm()`](https://github.com/RcppCore/RcppArmadillo/blob/master/R/fastLm.R)
 function.
 
-The `RcppArmadillo/Lightest` header includes [Rcpp][rcpp] via its `Rcpp/Lightest` header which
+The `RcppArmadillo/Lighter` header includes [Rcpp][rcpp] via its `Rcpp/Lighter` header which
 precludes some more compile-time heavy features such as 'Rcpp Modules' which we may not need. See
 the [Rcpp][rcpp] docs more details about 'Light', 'Lighter' and 'Lightest'.  In the example above,
-the switch saves about 15% to 20% of total compilation time.
+the switch saves about 15% of total compilation time.
 
 ### Status
 
diff --git a/src/RcppArmadillo.cpp b/src/RcppArmadillo.cpp
index d215cbb2..01c1ebf8 100644
--- a/src/RcppArmadillo.cpp
+++ b/src/RcppArmadillo.cpp
@@ -18,7 +18,7 @@
 // You should have received a copy of the GNU General Public License
 // along with RcppArmadillo.  If not, see <http://www.gnu.org/licenses/>.
 
-#include <RcppArmadillo/Lightest>
+#include <RcppArmadillo/Lighter>
 
 //' Report the version of Armadillo
 //'
diff --git a/src/fastLm.cpp b/src/fastLm.cpp
index 9aeafd2d..41b277e5 100644
--- a/src/fastLm.cpp
+++ b/src/fastLm.cpp
@@ -19,7 +19,7 @@
 // You should have received a copy of the GNU General Public License
 // along with RcppArmadillo.  If not, see <http://www.gnu.org/licenses/>.
 
-#include <RcppArmadillo/Lightest>
+#include <RcppArmadillo/Lighter>
 
 // [[Rcpp::export]]
 Rcpp::List fastLm_impl(const arma::mat& X, const arma::colvec& y) {