diff --git a/src/backend/commands/vacuumlazy.c b/src/backend/commands/vacuumlazy.c
index 93a97a922d0..86114f7b89b 100644
--- a/src/backend/commands/vacuumlazy.c
+++ b/src/backend/commands/vacuumlazy.c
@@ -1441,7 +1441,7 @@ lazy_truncate_heap(Relation onerel, LVRelStats *vacrelstats)
 				return;
 			}
 
-			pg_usleep(VACUUM_TRUNCATE_LOCK_WAIT_INTERVAL);
+			pg_usleep(VACUUM_TRUNCATE_LOCK_WAIT_INTERVAL * 1000L);
 		}
 
 		/*