diff --git a/src/hnsw.c b/src/hnsw.c
index 6248aa8..1c3c8ac 100644
--- a/src/hnsw.c
+++ b/src/hnsw.c
@@ -37,7 +37,7 @@ HnswInit(void)
 		);
 
 	DefineCustomIntVariable("hnsw.ef_search", "Sets the size of the dynamic candidate list for search",
-							"Valid range is 10..1000.", &hnsw_ef_search,
+							"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);
 }
 
diff --git a/src/hnsw.h b/src/hnsw.h
index 46c7889..0bc9c79 100644
--- a/src/hnsw.h
+++ b/src/hnsw.h
@@ -35,7 +35,7 @@
 #define HNSW_MIN_EF_CONSTRUCTION	10
 #define HNSW_MAX_EF_CONSTRUCTION		1000
 #define HNSW_DEFAULT_EF_SEARCH	40
-#define HNSW_MIN_EF_SEARCH		10
+#define HNSW_MIN_EF_SEARCH		1
 #define HNSW_MAX_EF_SEARCH		1000
 
 #define HNSW_ELEMENT_TUPLE_TYPE  1
diff --git a/test/expected/hnsw_options.out b/test/expected/hnsw_options.out
index be10beb..afdc67a 100644
--- a/test/expected/hnsw_options.out
+++ b/test/expected/hnsw_options.out
@@ -18,8 +18,8 @@ SHOW hnsw.ef_search;
  40
 (1 row)
 
-SET hnsw.ef_search = 9;
-ERROR:  9 is outside the valid range for parameter "hnsw.ef_search" (10 .. 1000)
+SET hnsw.ef_search = 0;
+ERROR:  0 is outside the valid range for parameter "hnsw.ef_search" (1 .. 1000)
 SET hnsw.ef_search = 1001;
-ERROR:  1001 is outside the valid range for parameter "hnsw.ef_search" (10 .. 1000)
+ERROR:  1001 is outside the valid range for parameter "hnsw.ef_search" (1 .. 1000)
 DROP TABLE t;
diff --git a/test/sql/hnsw_options.sql b/test/sql/hnsw_options.sql
index c289922..f70bb95 100644
--- a/test/sql/hnsw_options.sql
+++ b/test/sql/hnsw_options.sql
@@ -8,7 +8,7 @@ CREATE INDEX ON t USING hnsw (val vector_l2_ops) WITH (ef_construction = 1001);
 
 SHOW hnsw.ef_search;
 
-SET hnsw.ef_search = 9;
+SET hnsw.ef_search = 0;
 SET hnsw.ef_search = 1001;
 
 DROP TABLE t;