diff --git a/src/postorius/utils.py b/src/postorius/utils.py
index f8cc3a4..84d81a0 100644
--- a/src/postorius/utils.py
+++ b/src/postorius/utils.py
@@ -44,5 +44,5 @@
     """
     return render_to_response(
         'postorius/errors/generic.html',
-        {'error': "REST API not found / Offline"},
+        {'error': "Mailman REST API not available.  Please start Mailman core."},
         context_instance=RequestContext(request))
diff --git a/src/postorius/views/list.py b/src/postorius/views/list.py
index b3730ca..4c81b27 100644
--- a/src/postorius/views/list.py
+++ b/src/postorius/views/list.py
@@ -299,7 +299,7 @@
         the_list = List.objects.get_or_404(fqdn_listname=fqdn_listname)
     except AttributeError, e:
         return render_to_response('postorius/errors/generic.html',
-                                  {'error': "REST API not found / Offline"},
+                                  {'error': "Mailman REST API not available.  Please start Mailman core."},
                                   context_instance=RequestContext(request))
     # process submitted form
     if request.method == 'POST':
diff --git a/src/postorius/views/user.py b/src/postorius/views/user.py
index e512aeb..9a6b686 100644
--- a/src/postorius/views/user.py
+++ b/src/postorius/views/user.py
@@ -87,7 +87,7 @@
     except AttributeError, e:
         return render_to_response(
             'postorius/errors/generic.html',
-            {'error': str(e) + "REST API not found / Offline"},
+            {'error': str(e) + "Mailman REST API not available.  Please start Mailman core."},
             context_instance=RequestContext(request))
     except ValueError, e:
         return render_to_response('postorius/errors/generic.html',