diff --git a/targets/stm32l432/build/application.mk b/targets/stm32l432/build/application.mk
index 9fe649f..92abd43 100644
--- a/targets/stm32l432/build/application.mk
+++ b/targets/stm32l432/build/application.mk
@@ -11,6 +11,7 @@ SRC += ../../fido2/util.c ../../fido2/u2f.c ../../fido2/test_power.c
 SRC += ../../fido2/stubs.c ../../fido2/log.c  ../../fido2/ctaphid.c  ../../fido2/ctap.c
 SRC += ../../fido2/ctap_parse.c ../../fido2/main.c
 SRC += ../../fido2/extensions/extensions.c ../../fido2/extensions/solo.c
+SRC += ../../fido2/extensions/wallet.c
 
 # Crypto libs
 SRC += ../../crypto/sha256/sha256.c ../../crypto/micro-ecc/uECC.c ../../crypto/tiny-AES-c/aes.c