diff --git a/commons.profile b/commons.profile
index 78b40aa..d6e996c 100644
--- a/commons.profile
+++ b/commons.profile
@@ -161,6 +161,9 @@ function commons_install_tasks() {
     'commons_set_permissions' => array(
       'display' => FALSE,
     ),
+    'commons_set_variables' => array(
+      'display' => FALSE,
+    ),
   );
 }
 
@@ -274,6 +277,14 @@ function commons_set_permissions() {
 }
 
 /**
+ * Task callback; Set variables.
+ */
+function commons_set_variables() {
+  // Do not inform the user about new messages on login.
+  variable_set('privatemsg_display_loginmessage', FALSE);
+}
+
+/**
  * Save the full name of the first user.
  */
 function commons_admin_save_fullname($form_id, &$form_state) {