diff --git a/tcp_syni.nim b/tcp_syni.nim
index 0587b21..651eda6 100644
--- a/tcp_syni.nim
+++ b/tcp_syni.nim
@@ -296,7 +296,7 @@ proc accept*(puncher: TcpSyniPuncher, srcPort: Port, dstIp: IpAddress,
                                 tcpSeqNumber: seqNum, tcpAckNumber: 0,
                                 tcpFlags: {SYN}, tcpWindowSize: 1452 * 10)
         echo &"[{ipPacket.ipAddrSrc}:{ipPacket.tcpPortSrc} -> {ipPacket.ipAddrDst}:{ipPacket.tcpPortDst}, SEQ {ipPacket.tcpSeqNumber}] injecting SYN"
-        asyncCheck rawFd.injectTcpPacket(ipPacket)
+        await rawFd.injectTcpPacket(ipPacket)
     closeSocket(rawFd)
     await attempt.future or sleepAsync(Timeout)
     await attempt.deleteFirewallRules()