diff --git a/server/gameserver/obstacle.cc b/server/gameserver/obstacle.cc
index eaa275d..26a96f9 100644
--- a/server/gameserver/obstacle.cc
+++ b/server/gameserver/obstacle.cc
@@ -577,22 +577,41 @@ void Obstacle::OnExplosionHit(Explosion* e)
 
 bool Obstacle::CanThroughable(Creature* c)
 {
-    #if 0
-    if (meta->i->attack_type() == 4) {
-        return true;
+    switch (meta->i->collision_hit()) {
+    case kCollisionHitPass:
+        {
+            return true;
+        }
+        break;
+    default:
+        {
+            return false;
+        }
+        break;
     }
-    #endif
     return false;
 }
 
 bool Obstacle::CanThroughable(Bullet* bullet)
 {
-    #if 0
-    if (meta->i->attack_type() == 4) {
+    switch (meta->i->bullet_hit()) {
+    case kBulletHitPass:
+        {
+            return true;
+        }
+        break;
+    case kBulletHitOnlySpecDmg:
+        {
         return !(meta->receive_special_damage_type != 0 &&
                  ((bullet->gun_meta->special_damage_type & meta->receive_special_damage_type) != 0));
+        }
+        break;
+    default:
+        {
+            return false;
+        }
+        break;
     }
-    #endif
     return false;
 }