diff --git a/demo/Makefile b/demo/Makefile
index 57dcb06..306597b 100644
--- a/demo/Makefile
+++ b/demo/Makefile
@@ -13,5 +13,6 @@ OBJS += ../vendor/trezor-crypto/secp256k1.o
 OBJS += ../vendor/trezor-crypto/sha2.o
 OBJS += ../vendor/trezor-crypto/bip39.o
 OBJS += ../vendor/trezor-crypto/pbkdf2.o
+OBJS += ../vendor/trezor-crypto/memzero.o
 
 include ../Makefile.include