diff --git a/test_src/config.h b/test_src/config.h
index 2dda12a..9a63708 100644
--- a/test_src/config.h
+++ b/test_src/config.h
@@ -46,7 +46,7 @@
 #define UART0_DATABITS   UART_DATABITS_8
 #define UART0_RXBUFFER_SIZE 255
 #define UART0_TXBUFFER_SIZE 120
-#define UART0_SWFLOWCTRL     0
+#define UART0_SWFLOWCTRL     1
 #define UART0_THRESH_LOW     0
 #define UART0_THRESH_HIGH   32