diff --git a/drivers/network/tcpip/ip/transport/tcp/accept.c b/drivers/network/tcpip/ip/transport/tcp/accept.c
index 4d12c527fae..cfab933003d 100644
--- a/drivers/network/tcpip/ip/transport/tcp/accept.c
+++ b/drivers/network/tcpip/ip/transport/tcp/accept.c
@@ -82,6 +82,7 @@ NTSTATUS TCPListen(PCONNECTION_ENDPOINT Connection, UINT Backlog)
                 if (AllocatedPort == (UINT) -1)
                 {
                     DbgPrint("ERR: No more ports available.\n");
+                    UnlockObject(Connection);
                     return STATUS_TOO_MANY_ADDRESSES;
                 }
                 Connection->AddressFile->Port = AllocatedPort;
diff --git a/drivers/network/tcpip/ip/transport/tcp/tcp.c b/drivers/network/tcpip/ip/transport/tcp/tcp.c
index cd28ffaf71a..3d65e9a46b9 100644
--- a/drivers/network/tcpip/ip/transport/tcp/tcp.c
+++ b/drivers/network/tcpip/ip/transport/tcp/tcp.c
@@ -386,6 +386,7 @@ NTSTATUS TCPConnect
         if (AllocatedPort == (UINT) -1)
         {
             DbgPrint("ERR: No more ports available.\n");
+            UnlockObject(Connection);
             return STATUS_TOO_MANY_ADDRESSES;
         }
         Connection->AddressFile->Port = AllocatedPort;