diff --git a/safe-room.lic b/safe-room.lic
index 13b1bdb150..8d4ed8d4a0 100644
--- a/safe-room.lic
+++ b/safe-room.lic
@@ -285,7 +285,7 @@ class SafeRoom
     return false unless empath
 
     DRCT.walk_to room_id
-    return false unless DRRoom.pcs.include?(empath) || DRRoom.room_objs.grep(@plant_regex)
+    return false unless DRRoom.pcs.include?(empath) || DRRoom.room_objs.grep(@plant_regex).size > 0
 
     unless DRRoom.pcs.include?(empath)
       if /.*vela.tohr (\w+)/ =~ DRRoom.room_objs.grep(@plant_regex).to_s