diff --git a/source/cSocketThreads.cpp b/source/cSocketThreads.cpp
index b27523972..594d5a7d7 100644
--- a/source/cSocketThreads.cpp
+++ b/source/cSocketThreads.cpp
@@ -640,7 +640,8 @@ void cSocketThreads::cSocketThread::WriteToSockets(fd_set * a_Write)
 	cCSLock Lock(m_Parent->m_CS);
 	for (int i = m_NumSlots - 1; i >= 0; --i)
 	{
-		if (!FD_ISSET(m_Slots[i].m_Socket->GetSocket(), a_Write))
+		cSocket Socket(*(m_Slots[i].m_Socket));
+		if (!Socket.IsValid() || !FD_ISSET(Socket.GetSocket(), a_Write))
 		{
 			continue;
 		}