diff --git a/lib/redis/rediswriter-objects.cpp b/lib/redis/rediswriter-objects.cpp
index 3d747b8f5..e7e49e525 100644
--- a/lib/redis/rediswriter-objects.cpp
+++ b/lib/redis/rediswriter-objects.cpp
@@ -235,6 +235,11 @@ void RedisWriter::SendConfigUpdate(const ConfigObject::Ptr& object, bool useTran
 		}
 
 		checkSums->Set("group_checksums", groupChecksums);
+
+		auto period (user->GetPeriod());
+
+		if (period)
+			checkSums->Set("period_checksum", GetObjectIdentifier(period));
 	}
 
 	/* Calculate checkable checksums. */