diff --git a/var/spack/repos/builtin/packages/frontier-client/package.py b/var/spack/repos/builtin/packages/frontier-client/package.py
index 283d176822d..c91b45b2ff5 100644
--- a/var/spack/repos/builtin/packages/frontier-client/package.py
+++ b/var/spack/repos/builtin/packages/frontier-client/package.py
@@ -22,6 +22,7 @@ class FrontierClient(MakefilePackage):
 
     depends_on('pacparser')
     depends_on('expat')
+    depends_on('openssl')
 
     patch('frontier-client.patch', level=0)