diff --git a/server/gameserver/mapservice.cc b/server/gameserver/mapservice.cc
index 0834b3e..3af8fd4 100644
--- a/server/gameserver/mapservice.cc
+++ b/server/gameserver/mapservice.cc
@@ -190,7 +190,7 @@ void MapService::GetColliders(Room* room,
             }
             struct CellNode *node, *tmp;
             list_for_each_entry_safe(node, tmp, head, entry) {
-                if (node->collider->tag != 0) {
+                if (node->collider->tag != 0 && !a8::HasBitFlag(node->collider->tag, kHalfWallTag)) {
                     continue;
                 }
                 switch (node->collider->owner->GetEntityType()) {