diff --git a/var/spack/repos/builtin/packages/rust/package.py b/var/spack/repos/builtin/packages/rust/package.py
index 1b9b4f1cbc742b9f1e0cd83dad3c823c7c2922f2..486d526ea182ea2be03658e5b4f5937a80a68534 100644
--- a/var/spack/repos/builtin/packages/rust/package.py
+++ b/var/spack/repos/builtin/packages/rust/package.py
@@ -12,6 +12,9 @@ class Rust(Package):
     homepage = "http://www.rust-lang.org"
     git      = "https://github.com/rust-lang/rust.git"
 
+    version('develop', branch='master')
+    version('1.31.1', tag='1.31.1')
+    version('1.31.0', tag='1.31.0')  # "Rust 2018" edition
     version('1.30.1', tag='1.30.1')
 
     extendable = True