diff --git a/octodns/processor/acme.py b/octodns/processor/acme.py
index e786859..f50d924 100644
--- a/octodns/processor/acme.py
+++ b/octodns/processor/acme.py
@@ -16,18 +16,29 @@ class AcmeIgnoringProcessor(BaseProcessor):
     def __init__(self, name):
         super(AcmeIgnoringProcessor, self).__init__(name)
 
-    def _process(self, zone, *args, **kwargs):
+    def process_source_zone(self, zone, *args, **kwargs):
+        ret = self._clone_zone(zone)
+        for record in zone.records:
+            if record._type == 'TXT' and \
+               record.name.startswith('_acme-challenge'):
+                # We have a managed acme challenge record (owned by octoDNS) so
+                # we should mark it as such
+                record = record.copy()
+                record.values.append('*octoDNS*')
+                record.values.sort()
+            ret.add_record(record)
+        return ret
+
+    def process_target_zone(self, zone, *args, **kwargs):
         ret = self._clone_zone(zone)
         for record in zone.records:
             # Uses a startswith rather than == to ignore subdomain challenges,
             # e.g. _acme-challenge.foo.domain.com when managing domain.com
             if record._type == 'TXT' and \
-               record.name.startswith('_acme-challenge'):
+               record.name.startswith('_acme-challenge') and \
+               '*octoDNS*' not in record.values:
                 self.log.info('_process: ignoring %s', record.fqdn)
                 continue
             ret.add_record(record)
 
         return ret
-
-    process_source_zone = _process
-    process_target_zone = _process