diff --git a/recipes-kernel/linux/files/freedom-u540/extra.cfg b/recipes-kernel/linux/files/freedom-u540/extra.cfg
index b5130a4..1d0d5dd 100644
--- a/recipes-kernel/linux/files/freedom-u540/extra.cfg
+++ b/recipes-kernel/linux/files/freedom-u540/extra.cfg
@@ -38,3 +38,5 @@ CONFIG_EXT3_FS=y
 CONFIG_F2FS_FS=y
 CONFIG_F2FS_FS_SECURITY=y
 CONFIG_FUSE_FS=m
+CONFIG_USB_ACM=y
+CONFIG_USB_SERIAL=y