diff --git a/gnu/packages/algebra.scm b/gnu/packages/algebra.scm
index 7e26e76f4a..0e22e41326 100644
--- a/gnu/packages/algebra.scm
+++ b/gnu/packages/algebra.scm
@@ -1,7 +1,7 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017 Andreas Enge <andreas@enge.fr>
 ;;; Copyright © 2013, 2015, 2017 Ludovic Courtès <ludo@gnu.org>
-;;; Copyright © 2016, 2017 Nicolas Goaziou <mail@nicolasgoaziou.fr>
+;;; Copyright © 2016, 2017, 2018 Nicolas Goaziou <mail@nicolasgoaziou.fr>
 ;;; Copyright © 2014 Mark H Weaver <mhw@netris.org>
 ;;; Copyright © 2016 Ricardo Wurmus <rekado@elephly.net>
 ;;; Copyright © 2017 Efraim Flashner <efraim@flashner.co.il>
@@ -208,7 +208,7 @@ (define-public gp2c
 (define-public giac-xcas
   (package
     (name "giac-xcas")
-    (version "1.4.9-33")
+    (version "1.4.9-43")
     (source (origin
               (method url-fetch)
               ;; "~parisse/giac" is not used because the maintainer regularly
@@ -220,7 +220,7 @@ (define-public giac-xcas
                                   "source/giac_" version ".tar.gz"))
               (sha256
                (base32
-                "1f071j4l9ayri2cxka6bfdb6c0fsdl7q7wk345r7hxjfga69g9mv"))))
+                "1zhbyw4mrgf78fz55cf65650zqld156qa40s4ps69bas8jh61hci"))))
     (build-system gnu-build-system)
     (arguments
      `(#:phases