--- a/dom/network/TCPSocketParent.cpp
+++ b/dom/network/TCPSocketParent.cpp
@@ -355,18 +355,21 @@ TCPSocketParent::FireStringDataEvent(con
   MOZ_ASSERT(!mFilter, "Socket filtering doesn't support nsCString");
 
   SendEvent(NS_LITERAL_STRING("data"), data, aReadyState);
 }
 
 void
 TCPSocketParent::SendEvent(const nsAString& aType, CallbackData aData, TCPReadyState aReadyState)
 {
-  mozilla::Unused << PTCPSocketParent::SendCallback(nsString(aType), aData,
-                                                    static_cast<uint32_t>(aReadyState));
+  if (mIPCOpen) {
+    mozilla::Unused << PTCPSocketParent::SendCallback(nsString(aType),
+                                                      aData,
+                                                      static_cast<uint32_t>(aReadyState));
+  }
 }
 
 void
 TCPSocketParent::SetSocket(TCPSocket *socket)
 {
   mSocket = socket;
 }