diff --git a/ports/rp2/tusb_config.h b/ports/rp2/tusb_config.h
index 1402edf379..8c2a9f7560 100644
--- a/ports/rp2/tusb_config.h
+++ b/ports/rp2/tusb_config.h
@@ -28,6 +28,7 @@
 #define CFG_TUSB_RHPORT0_MODE   (OPT_MODE_DEVICE)
 
 #define CFG_TUD_CDC             (1)
+#define CFG_TUD_CDC_EP_BUFSIZE  (256)
 #define CFG_TUD_CDC_RX_BUFSIZE  (256)
 #define CFG_TUD_CDC_TX_BUFSIZE  (256)