diff --git a/src/hnsw.c b/src/hnsw.c
index c81b556..5ca9b8e 100644
--- a/src/hnsw.c
+++ b/src/hnsw.c
@@ -69,8 +69,8 @@ HnswInit(void)
 							"Valid range is 1..1000.", &hnsw_ef_search,
 							HNSW_DEFAULT_EF_SEARCH, HNSW_MIN_EF_SEARCH, HNSW_MAX_EF_SEARCH, PGC_USERSET, 0, NULL, NULL, NULL);
 
-	DefineCustomBoolVariable("hnsw.streaming", "todo",
-							 "todo", &hnsw_streaming,
+	DefineCustomBoolVariable("hnsw.streaming", "Use streaming mode",
+							 NULL, &hnsw_streaming,
 							 HNSW_DEFAULT_STREAMING, PGC_USERSET, 0, NULL, NULL, NULL);
 
 	MarkGUCPrefixReserved("hnsw");