diff --git a/var/spack/repos/builtin/packages/cmake/package.py b/var/spack/repos/builtin/packages/cmake/package.py
index edb3decf60..d8691a049c 100644
--- a/var/spack/repos/builtin/packages/cmake/package.py
+++ b/var/spack/repos/builtin/packages/cmake/package.py
@@ -39,10 +39,11 @@ class Cmake(Package):
     version('3.4.3',    '4cb3ff35b2472aae70f542116d616e63')
     version('3.4.0',    'cd3034e0a44256a0917e254167217fc8')
     version('3.3.1',    '52638576f4e1e621fed6c3410d3a1b12')
+    version('3.1.0',    '188eb7dc9b1b82b363bc51c0d3f1d461')
     version('3.0.2',    'db4c687a31444a929d2fdc36c4dfb95f')
     version('2.8.10.2', '097278785da7182ec0aea8769d06860c')
 
-    variant('ownlibs', default=True, description='Use CMake-provided third-party libraries')
+    variant('ownlibs', default=True,  description='Use CMake-provided third-party libraries')
     variant('qt',      default=False, description='Enables the build of cmake-gui')
     variant('doc',     default=False, description='Enables the generation of html and man page documentation')
     variant('openssl', default=True,  description="Enables CMake's OpenSSL features")