diff --git a/lib/redis/rediswriter-objects.cpp b/lib/redis/rediswriter-objects.cpp
index 0b93bcd34..570a0efd3 100644
--- a/lib/redis/rediswriter-objects.cpp
+++ b/lib/redis/rediswriter-objects.cpp
@@ -217,7 +217,8 @@ void RedisWriter::SendConfigUpdate(const ConfigObject::Ptr& object, bool useTran
 
 		checkSums->Set("group_checksums", groupChecksums);
 
-		checkSums->Set("zone_checksum", GetIdentifier(checkable->GetZone()));
+		if (checkable->GetZone())
+			checkSums->Set("zone_checksum", GetIdentifier(checkable->GetZone()));
 	} else {
 		Zone::Ptr zone = dynamic_pointer_cast<Zone>(object);