diff --git a/comm/src/comm.c b/comm/src/comm.c
index ad6033066649c35e182b78b06201f62c23af2528..40b936217726d6bf9bb28b0f41b3541cd8431e9b 100644
--- a/comm/src/comm.c
+++ b/comm/src/comm.c
@@ -272,7 +272,7 @@ comm_error comm_send_dma(TComm *dev,unsigned char *data,unsigned short int lengt
 void comm_do_dma_send(TComm *dev)
 {
   dev->dma_waiting_buffer_empty=0x01;
-  dev->irq_sending=0x01;
+  dev->irq_sending=0x00;
   dev->dma_sending=0x00;
   dev->enable_tx_irq(); 
 }