diff --git a/library/Makefile b/library/Makefile
index 311e316..9316024 100644
--- a/library/Makefile
+++ b/library/Makefile
@@ -52,7 +52,7 @@
 		padlock.o	pbkdf2.o	pem.o			\
 		pkcs5.o		pkcs11.o	pkcs12.o		\
 		pk.o		pk_wrap.o	pkparse.o		\
-		pkwrite.o	ripemd160.o					\
+		pkwrite.o	platform.o	ripemd160.o		\
 		rsa.o		sha1.o		sha256.o		\
 		sha512.o	ssl_cache.o	ssl_cli.o		\
 		ssl_srv.o   ssl_ciphersuites.o			\