diff --git a/src/hnsw.c b/src/hnsw.c
index 6b0fdc1..2b6d8b1 100644
--- a/src/hnsw.c
+++ b/src/hnsw.c
@@ -77,6 +77,7 @@ HnswInit(void)
 							 HNSW_DEFAULT_STREAMING, PGC_USERSET, 0, NULL, NULL, NULL);
 
 	/* TODO Figure out name */
+	/* TODO Use same value as ivfflat.max_probes for "all" */
 	DefineCustomIntVariable("hnsw.ef_stream", "Sets the max number of additional candidates to visit for streaming search",
 							"-1 means all", &hnsw_ef_stream,
 							HNSW_DEFAULT_EF_STREAM, HNSW_MIN_EF_STREAM, HNSW_MAX_EF_STREAM, PGC_USERSET, 0, NULL, NULL, NULL);