diff --git a/FreeModbus/modbus/rtu/mbrtu.c b/FreeModbus/modbus/rtu/mbrtu.c
index c023c92..aefa7bb 100644
--- a/FreeModbus/modbus/rtu/mbrtu.c
+++ b/FreeModbus/modbus/rtu/mbrtu.c
@@ -330,9 +330,10 @@ xMBRTUTimerT35Expired( void )
         xNeedPoll = xMBPortEventPost( EV_READY );
         break;
 
-        /* A frame was received and t35 expired. Notify the listener that
+        /* A frame was received and t35 expired. Close serial receive and notify the listener that
          * a new frame was received. */
     case STATE_RX_RCV:
+    	vMBPortSerialEnable( FALSE, FALSE );
         xNeedPoll = xMBPortEventPost( EV_FRAME_RECEIVED );
         break;
 
diff --git a/FreeModbus/modbus/rtu/mbrtu_m.c b/FreeModbus/modbus/rtu/mbrtu_m.c
index 4756f57..e5c9267 100644
--- a/FreeModbus/modbus/rtu/mbrtu_m.c
+++ b/FreeModbus/modbus/rtu/mbrtu_m.c
@@ -356,9 +356,10 @@ xMBMasterRTUTimerExpired(void)
 		xNeedPoll = xMBMasterPortEventPost(EV_MASTER_READY);
 		break;
 
-		/* A frame was received and t35 expired. Notify the listener that
+		/* A frame was received and t35 expired. Close serial receive and notify the listener that
 		 * a new frame was received. */
 	case STATE_M_RX_RCV:
+		vMBMasterPortSerialEnable( FALSE, FALSE );
 		xNeedPoll = xMBMasterPortEventPost(EV_MASTER_FRAME_RECEIVED);
 		break;