diff --git a/src/cdc_uart.c b/src/cdc_uart.c
index 45942cf8c..4890057f0 100644
--- a/src/cdc_uart.c
+++ b/src/cdc_uart.c
@@ -55,7 +55,7 @@ void cdc_task(void)
         rx_buf[rx_len++] = uart_getc(PICOPROBE_UART_INTERFACE);
     }
 
-    if (tud_cdc_connected()) {
+    if (tud_ready()) {
         was_connected = 1;
         int written = 0;
         /* Implicit overflow if we don't write all the bytes to the host.