diff --git a/proto/aggregator/config.Y b/proto/aggregator/config.Y
index 44b7752f..0eb160cb 100644
--- a/proto/aggregator/config.Y
+++ b/proto/aggregator/config.Y
@@ -20,7 +20,7 @@ CF_DEFINES
 
 CF_DECLS
 
-CF_KEYWORDS(AGGREGATOR, AGGREGATE, ON, MERGE, BY)
+CF_KEYWORDS(AGGREGATOR, PEER, AGGREGATE, ON, MERGE, BY)
 
 %type <ai> aggr_item aggr_list