diff --git a/var/spack/repos/builtin/packages/gsl/package.py b/var/spack/repos/builtin/packages/gsl/package.py
index 8e7b5af71c..173f6742fa 100644
--- a/var/spack/repos/builtin/packages/gsl/package.py
+++ b/var/spack/repos/builtin/packages/gsl/package.py
@@ -17,6 +17,7 @@ class Gsl(AutotoolsPackage, GNUMirrorPackage):
     homepage = "http://www.gnu.org/software/gsl"
     gnu_mirror_path = "gsl/gsl-2.3.tar.gz"
 
+    version('2.6', sha256='b782339fc7a38fe17689cb39966c4d821236c28018b6593ddb6fd59ee40786a8')
     version('2.5', sha256='0460ad7c2542caaddc6729762952d345374784100223995eb14d614861f2258d')
     version('2.4',   sha256='4d46d07b946e7b31c19bbf33dda6204d7bedc2f5462a1bae1d4013426cd1ce9b')
     version('2.3',   sha256='562500b789cd599b3a4f88547a7a3280538ab2ff4939504c8b4ac4ca25feadfb')