diff --git a/HISTORY.md b/HISTORY.md
index b9f3b5e02..c79860abd 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -4,6 +4,8 @@
 ## not yet released, version 2.4.1
 
 - Fixed #480: `nthRoot` not working on Internet Explorer (up to IE 11).
+- Fixed #489: an issue with initializing a sparse matrix without data.
+  Thanks @Retsam.
 
 
 ## 2015-10-09, version 2.4.0
diff --git a/package.json b/package.json
index cc553cccf..468a1ec62 100644
--- a/package.json
+++ b/package.json
@@ -28,6 +28,7 @@
     "Owen Versteeg (https://github.com/owenversteeg)",
     "Pavel Panchekha (https://github.com/pavpanchekha)",
     "Pete Corey (https://github.com/pcorey)",
+    "Retsam (https://github.com/Retsam)",
     "Robert Eisele (https://github.com/infusion)",
     "Rogelio J. Baucells (https://github.com/rjbaucells)",
     "Ryan Seys (https://github.com/ryanseys)",