diff --git a/README.md b/README.md
index f351bbe89..36f7d75c3 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,8 @@
-# Tezos Ledger Wallet App Revamped
+# Tezos Ledger Wallet App
+
+## Interfaces
+
+Both `webusb` and `u2f` interfaces are supported. For example, `u2f` interface is used by the [Kukai](https://wallet.kukai.app/connect-ledger) web wallet.
 
 ## Compile using `docker` containers for build dependencies
 
diff --git a/app/Makefile b/app/Makefile
index 10035bf70..eaf77045e 100644
--- a/app/Makefile
+++ b/app/Makefile
@@ -145,6 +145,12 @@ CFLAGS   += -Wwrite-strings
 ENABLE_BLUETOOTH = 1
 #ENABLE_NFC = 1
 
+# U2F - used e.g. by Kukai wallet
+SDK_SOURCE_PATH  += lib_u2f lib_stusb_impl
+DEFINES   += USB_SEGMENT_SIZE=64
+DEFINES   += U2F_PROXY_MAGIC=\"XTZ\"
+DEFINES   += HAVE_IO_U2F HAVE_U2F
+
 ########################################
 #         NBGL custom features         #
 ########################################