diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index 8907a5f7d4..022ffe57ae 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -134,7 +134,7 @@
 #vacuum_cost_page_hit = 1		# 0-10000 credits
 #vacuum_cost_page_miss = 10		# 0-10000 credits
 #vacuum_cost_page_dirty = 20		# 0-10000 credits
-#vacuum_cost_limit = 200		# 0-10000 credits
+#vacuum_cost_limit = 200		# 1-10000 credits
 
 # - Background Writer -