diff --git a/slsReceiverSoftware/include/sls_receiver_defs.h b/slsReceiverSoftware/include/sls_receiver_defs.h
index 2f0260db3..5ef101b6b 100755
--- a/slsReceiverSoftware/include/sls_receiver_defs.h
+++ b/slsReceiverSoftware/include/sls_receiver_defs.h
@@ -34,7 +34,7 @@ typedef  int int32_t;
 #define DEFAULT_UDP_PORTNO 		50001
 #define DEFAULT_GUI_PORTNO 		65001
 #define DEFAULT_ZMQ_CL_PORTNO 	30001
-#define DEFAULT_ZMQ_RX_PORTNO 	31000
+#define DEFAULT_ZMQ_RX_PORTNO 	30001
 
 /** 
     \file sls_receiver_defs.h
diff --git a/slsReceiverSoftware/src/slsReceiverTCPIPInterface.cpp b/slsReceiverSoftware/src/slsReceiverTCPIPInterface.cpp
index 1347ca629..7be6534e3 100644
--- a/slsReceiverSoftware/src/slsReceiverTCPIPInterface.cpp
+++ b/slsReceiverSoftware/src/slsReceiverTCPIPInterface.cpp
@@ -683,6 +683,11 @@ int slsReceiverTCPIPInterface::send_update() {
 #endif
 	mySock->SendDataOnly(&ind,sizeof(ind));
 
+	// data streaming enable
+#ifdef SLS_RECEIVER_UDP_FUNCTIONS
+	ind=(int)receiverBase->getDataStreamEnable();
+#endif
+
 	if (!lockStatus)
 		strcpy(mySock->lastClientIP,mySock->thisClientIP);