diff --git a/lib/Lacuna/Constants.pm b/lib/Lacuna/Constants.pm
index 49571be4..10a0e523 100644
--- a/lib/Lacuna/Constants.pm
+++ b/lib/Lacuna/Constants.pm
@@ -106,7 +106,7 @@ use constant SHIP_TYPES => (qw( probe short_range_colony_ship colony_ship spy_po
                              gas_giant_settlement_ship scow dory freighter snark snark2 snark3 thud
                              drone fighter spy_shuttle observatory_seeker security_ministry_seeker 
                              spaceport_seeker excavator detonator scanner barge hulk galleon
-                             placebo placebo2 placebo3 placebo4 placebo5 placebo6 bleeder
+                             placebo placebo2 placebo3 placebo4 placebo5 placebo6 bleeder sweeper
                              ));