diff --git a/ports/renesas-ra/boards/ARDUINO_PORTENTA_C33/mpconfigboard.mk b/ports/renesas-ra/boards/ARDUINO_PORTENTA_C33/mpconfigboard.mk
index 9bb336d65e..69333eab4a 100644
--- a/ports/renesas-ra/boards/ARDUINO_PORTENTA_C33/mpconfigboard.mk
+++ b/ports/renesas-ra/boards/ARDUINO_PORTENTA_C33/mpconfigboard.mk
@@ -3,8 +3,9 @@ MCU_SERIES = m33
 LD_FILES = boards/ARDUINO_PORTENTA_C33/ra6m5.ld
 CFLAGS += -DCFG_TUH_MAX_SPEED=OPT_MODE_FULL_SPEED \
           -DCFG_TUD_MAX_SPEED=OPT_MODE_HIGH_SPEED \
-          -DCFG_TUSB_RHPORT0_MODE=0\
-          -DCFG_TUSB_RHPORT1_MODE=OPT_MODE_DEVICE
+          -DCFG_TUSB_RHPORT0_MODE=0 \
+          -DCFG_TUSB_RHPORT1_MODE=OPT_MODE_DEVICE \
+          -DCFG_TUD_TASK_QUEUE_SZ=128
 
 # MicroPython settings
 MICROPY_VFS_FAT = 1