diff --git a/nuttx-configs/px4fmu-v5/nsh/defconfig b/nuttx-configs/px4fmu-v5/nsh/defconfig
index bc25a9f1ab..897d3e1723 100644
--- a/nuttx-configs/px4fmu-v5/nsh/defconfig
+++ b/nuttx-configs/px4fmu-v5/nsh/defconfig
@@ -962,7 +962,7 @@ CONFIG_CDCACM_NRDREQS=4
 CONFIG_CDCACM_NWRREQS=4
 CONFIG_CDCACM_BULKIN_REQLEN=96
 CONFIG_CDCACM_RXBUFSIZE=600
-CONFIG_CDCACM_TXBUFSIZE=8000
+CONFIG_CDCACM_TXBUFSIZE=12000
 CONFIG_CDCACM_VENDORID=0x26ac
 CONFIG_CDCACM_PRODUCTID=0x0032
 CONFIG_CDCACM_VENDORSTR="3D Robotics"