diff --git a/tcp_syni.nim b/tcp_syni.nim
index 0060ca0..4ca7381 100644
--- a/tcp_syni.nim
+++ b/tcp_syni.nim
@@ -258,6 +258,7 @@ proc doAccept(puncher: TcpSyniPuncher, srcIp: IpAddress,
       # FIXME: should attempts have timestamps, so we can decide here which ones to delete?
       if attempts.len() <= 1:
         break
+  sock.close()
 
 proc accept*(puncher: TcpSyniPuncher, srcPort: Port, dstIp: IpAddress,
              dstPorts: seq[Port],