diff --git a/var/spack/repos/builtin/packages/trilinos/package.py b/var/spack/repos/builtin/packages/trilinos/package.py
index 4d52119a915f1760db2fc1a7b605ffff8dadadfb..70069931d04f24400f5306eabc9e90f0a3ab1940 100644
--- a/var/spack/repos/builtin/packages/trilinos/package.py
+++ b/var/spack/repos/builtin/packages/trilinos/package.py
@@ -701,6 +701,7 @@ def cmake_args(self):
             options.extend([
                 '-DTpetra_INST_DOUBLE:BOOL=ON',
                 '-DTpetra_INST_INT_LONG:BOOL=ON',
+                '-DTpetra_INST_INT_LONG_LONG:BOOL=ON',
                 '-DTpetra_INST_COMPLEX_DOUBLE=%s' % complex_s,
                 '-DTpetra_INST_COMPLEX_FLOAT=%s' % complex_float_s,
                 '-DTpetra_INST_FLOAT=%s' % float_s,