diff --git a/subsys/usb/device/class/cdc_acm.c b/subsys/usb/device/class/cdc_acm.c
index 80e9b561059..d3148fba48f 100644
--- a/subsys/usb/device/class/cdc_acm.c
+++ b/subsys/usb/device/class/cdc_acm.c
@@ -1033,7 +1033,7 @@ static void cdc_acm_poll_out(const struct device *dev, unsigned char c)
 
 	while (!ring_buf_put(dev_data->tx_ringbuf, &c, 1)) {
 		if (k_is_in_isr() || !dev_data->flow_ctrl) {
-			LOG_INF("Ring buffer full, discard %c", c);
+			LOG_WRN_ONCE("Ring buffer full, discard data");
 			break;
 		}