diff --git a/Kcp/Kcp.cs b/Kcp/Kcp.cs
index 6a0cc0e..eb3f2da 100644
--- a/Kcp/Kcp.cs
+++ b/Kcp/Kcp.cs
@@ -18,6 +18,7 @@ public Kcp(uint conv_, IKcpCallback callback, IRentable rentable = null)
         {
             callbackHandle = callback;
             this.rentable = rentable;
+            buffer = CreateBuffer(BufferNeedSize);
         }
 
 
diff --git a/Kcp/KcpCore.cs b/Kcp/KcpCore.cs
index 15db257..a0b3f34 100644
--- a/Kcp/KcpCore.cs
+++ b/Kcp/KcpCore.cs
@@ -298,8 +298,9 @@ protected int BufferNeedSize
 
         #endregion
 
-        public ISegmentManager<Segment> SegmentManager { get; set; }
-        public KcpCore(uint conv_)
+        public ISegmentManager<TSegment> SegmentManager { get; set; }
+
+        public KcpCore(uint conv_, bool initBuffer = true)
         {
             conv = conv_;
 
@@ -308,7 +309,10 @@ public KcpCore(uint conv_)
             rmt_wnd = IKCP_WND_RCV;
             mtu = IKCP_MTU_DEF;
             mss = mtu - IKCP_OVERHEAD;
-            buffer = CreateBuffer(BufferNeedSize);
+            if (initBuffer)
+            {
+                buffer = CreateBuffer(BufferNeedSize);
+            }
 
             rx_rto = IKCP_RTO_DEF;
             rx_minrto = IKCP_RTO_MIN;