diff --git a/var/spack/repos/builtin/packages/trilinos/package.py b/var/spack/repos/builtin/packages/trilinos/package.py
index 1eb9db709ea..46ccd614f46 100644
--- a/var/spack/repos/builtin/packages/trilinos/package.py
+++ b/var/spack/repos/builtin/packages/trilinos/package.py
@@ -650,6 +650,7 @@ def define_enable(suffix, value=None):
                 ),
                 define_from_variant("Amesos2_ENABLE_Basker", "basker"),
                 define_from_variant("Amesos2_ENABLE_LAPACK", "amesos2"),
+                define_from_variant("Amesos2_ENABLE_MUMPS", "mumps"),
             ]
         )