diff --git a/manifests/group.pp b/manifests/group.pp
index cf0c55f4..6388bc4d 100644
--- a/manifests/group.pp
+++ b/manifests/group.pp
@@ -1,4 +1,7 @@
 # Create the RVM group
 class rvm::group inherits rvm::params {
-  ensure_resource('group', $rvm::params::group, {'ensure' => 'present' })
+  ensure_resource('group', $rvm::params::group, {
+    'ensure' => 'present',
+    'system' => true,
+  })
 }
diff --git a/manifests/system_user.pp b/manifests/system_user.pp
index 51cd1a1c..2da39cdc 100644
--- a/manifests/system_user.pp
+++ b/manifests/system_user.pp
@@ -11,7 +11,10 @@
   }
 
   if $create {
-    ensure_resource('user', $name, {'ensure' => 'present' })
+    ensure_resource('user', $name, {
+      'ensure' => 'present',
+      'system' => true,
+    })
     User[$name] -> Exec["rvm-system-user-${name}"]
   }