diff --git a/map_gen/shared/hail_hydra.lua b/map_gen/shared/hail_hydra.lua
index 5bd5197bb..4fca6a711 100644
--- a/map_gen/shared/hail_hydra.lua
+++ b/map_gen/shared/hail_hydra.lua
@@ -151,6 +151,9 @@ local on_died =
             if group and group.valid and #group.members > 0 then
                 group.set_command(command)
             end
+            if group and group.valid and #group.members == 0 then
+                group.destroy()
+            end
         end
     end
 )