diff --git a/lib.py b/lib.py
index c172eca..2fa035b 100755
--- a/lib.py
+++ b/lib.py
@@ -45,6 +45,11 @@ class Client(object):
                 raise Exception('No object found for %s' % label)
         return self.phid_cache[label]
 
+    def getSubprojects(self, phid):
+        """Lookup information on a Phab object by name."""
+        r = self.post('project.search', {'constraints': {'isMilestone': True, 'ancestors': [phid]}})
+        return [i['phid'] for i in r['data']]
+
     def getColumns(self, project_phid):
         if not self.column_cache.get(project_phid):
             self.column_cache[project_phid] = self.post(
diff --git a/project_grouper.py b/project_grouper.py
index 75fa61a..8b33f42 100644
--- a/project_grouper.py
+++ b/project_grouper.py
@@ -282,7 +282,8 @@ client = Client.newFromCreds()
 for rule in rules:
     handled_tasks = []
 
-    wanted_project_phid = client.lookupPhid('#' + rule['add'])
+    wanted_project_phid = client.lookupPhid('#' + rule['add'].replace(' ', '_'))
+    subprojects = set(client.getSubprojects(wanted_project_phid) + [wanted_project_phid])
     for project_name in rule['in']:
         project_name = project_name.replace(' ', '_')
         try:
@@ -294,7 +295,7 @@ for rule in rules:
             if task_phid in handled_tasks:
                 continue
             task = client.taskDetails(task_phid)
-            if wanted_project_phid in task['projectPHIDs']:
+            if subprojects.intersection(set(task['projectPHIDs'])):
                 continue
             if rule.get('once') == True:
                 is_already_added = False