diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index 4e49d5b..776cae3 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -2963,7 +2963,7 @@ static struct config_real ConfigureNamesReal[] =
 			NULL
 		},
 		&autovacuum_vac_scale,
-		0.2, 0.0, 100.0,
+		0.2, 0.0, 1.0,
 		NULL, NULL, NULL
 	},
 	{
@@ -2972,7 +2972,7 @@ static struct config_real ConfigureNamesReal[] =
 			NULL
 		},
 		&autovacuum_anl_scale,
-		0.1, 0.0, 100.0,
+		0.1, 0.0, 1.0,
 		NULL, NULL, NULL
 	},