diff --git a/plugins/hub/save_failed_tree.py b/plugins/hub/save_failed_tree.py
index c818632a..46ee865b 100644
--- a/plugins/hub/save_failed_tree.py
+++ b/plugins/hub/save_failed_tree.py
@@ -16,9 +16,10 @@ allowed_methods = None
 
 @export
 def saveFailedTree(taskID, full=False, **opts):
-    '''xmlrpc method for creating saveFailedTree task. If arguments are
-    invalid, error message is returned. Otherwise task id of newly created
-    task is returned.'''
+    """Create saveFailedTree task
+
+    If arguments are invalid, error message is returned. Otherwise task id of
+    newly created task is returned."""
     global config, allowed_methods
 
     # let it raise errors
@@ -35,12 +36,14 @@ def saveFailedTree(taskID, full=False, **opts):
 
     task_info = kojihub.Task(taskID).getInfo()
     if task_info['state'] != koji.TASK_STATES['FAILED']:
-        raise koji.PreBuildError, 'Task %s has not failed. Only failed tasks can upload their buildroots.' % taskID
+        raise koji.PreBuildError("Task %s has not failed. Only failed tasks can upload their buildroots." % taskID)
     elif allowed_methods != '*' and task_info['method'] not in allowed_methods:
-        raise koji.PreBuildError, 'Only %s tasks can upload their buildroots (Task %s is %s).' % \
-               (', '.join(allowed_methods), task_info['id'], task_info['method'])
+        raise koji.PreBuildError("Only %s tasks can upload their buildroots (Task %s is %s)." % \
+               (', '.join(allowed_methods), task_info['id'], task_info['method']))
     elif task_info["owner"] != context.session.user_id and not context.session.assertPerm('admin'):
-        raise koji.ActionNotAllowed, "only owner of failed task or 'admin' can run this task"
+        raise koji.ActionNotAllowed("Only owner of failed task or 'admin' can run this task.")
+    elif not kojihub.get_host(task_info['host_id'])['enabled']:
+        raise koji.PreBuildError("Host is disabled.")
 
     args = koji.encode_args(taskID, full, **opts)
     taskopts = {