diff --git a/include/ascs/container.h b/include/ascs/container.h
index 6230795bd755e20e6dba38d6ca8a567b190b1b21..fb6000f82b17042ef9547717d8d57fa61e0ba867 100644
--- a/include/ascs/container.h
+++ b/include/ascs/container.h
@@ -137,7 +137,7 @@ public:
 
 	bool try_dequeue_(T& item) {if (this->empty()) return false; item.swap(this->front()); this->pop_front(); buff_size -= item.size(); return true;}
 
-	void move_items_out_(Container& dest, size_t max_item_num = -1) //not thread safe
+	void move_items_out_(Container& dest, size_t max_item_num = -1)
 	{
 		if ((size_t) -1 == max_item_num)
 		{
@@ -158,7 +158,7 @@ public:
 		}
 	}
 
-	void move_items_out_(size_t max_size_in_byte, Container& dest) //not thread safe
+	void move_items_out_(size_t max_size_in_byte, Container& dest)
 	{
 		if ((size_t) -1 == max_size_in_byte)
 		{