diff --git a/src/crypto/Makefile b/src/crypto/Makefile
index fcf9586..2a92109 100644
--- a/src/crypto/Makefile
+++ b/src/crypto/Makefile
@@ -9,6 +9,7 @@
 
 include ../lib.rules
 
+CFLAGS += -DCONFIG_CRYPTO_INTERNAL
 CFLAGS += -DCONFIG_TLS_INTERNAL_CLIENT
 CFLAGS += -DCONFIG_TLS_INTERNAL_SERVER
 #CFLAGS += -DALL_DH_GROUPS
diff --git a/src/crypto/fips_prf_cryptoapi.c b/src/crypto/fips_prf_cryptoapi.c
deleted file mode 100644
index dca93a3..0000000
--- a/src/crypto/fips_prf_cryptoapi.c
+++ /dev/null
@@ -1,19 +0,0 @@
-/*
- * FIPS 186-2 PRF for Microsoft CryptoAPI
- * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
- *
- * This software may be distributed under the terms of the BSD license.
- * See README for more details.
- */
-
-#include "includes.h"
-
-#include "common.h"
-#include "crypto.h"
-
-
-int fips186_2_prf(const u8 *seed, size_t seed_len, u8 *x, size_t xlen)
-{
-	/* FIX: how to do this with CryptoAPI? */
-	return -1;
-}
diff --git a/src/crypto/fips_prf_gnutls.c b/src/crypto/fips_prf_gnutls.c
deleted file mode 100644
index 947e6f6..0000000
--- a/src/crypto/fips_prf_gnutls.c
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * FIPS 186-2 PRF for libgcrypt
- * Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
- *
- * This software may be distributed under the terms of the BSD license.
- * See README for more details.
- */
-
-#include "includes.h"
-#include <gcrypt.h>
-
-#include "common.h"
-#include "crypto.h"
-
-
-int fips186_2_prf(const u8 *seed, size_t seed_len, u8 *x, size_t xlen)
-{
-	/* FIX: how to do this with libgcrypt? */
-	return -1;
-}
diff --git a/src/crypto/fips_prf_nss.c b/src/crypto/fips_prf_nss.c
deleted file mode 100644
index 2c962f4..0000000
--- a/src/crypto/fips_prf_nss.c
+++ /dev/null
@@ -1,19 +0,0 @@
-/*
- * FIPS 186-2 PRF for NSS
- * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
- *
- * This software may be distributed under the terms of the BSD license.
- * See README for more details.
- */
-
-#include "includes.h"
-#include <openssl/sha.h>
-
-#include "common.h"
-#include "crypto.h"
-
-
-int fips186_2_prf(const u8 *seed, size_t seed_len, u8 *x, size_t xlen)
-{
-	return -1;
-}
diff --git a/src/crypto/sha1-internal.c b/src/crypto/sha1-internal.c
index 10bf153..24bc3ff 100644
--- a/src/crypto/sha1-internal.c
+++ b/src/crypto/sha1-internal.c
@@ -19,6 +19,7 @@
 void SHA1Transform(u32 state[5], const unsigned char buffer[64]);
 
 
+#ifdef CONFIG_CRYPTO_INTERNAL
 /**
  * sha1_vector - SHA-1 hash for data vector
  * @num_elem: Number of elements in the data vector
@@ -38,6 +39,7 @@
 	SHA1Final(mac, &ctx);
 	return 0;
 }
+#endif /* CONFIG_CRYPTO_INTERNAL */
 
 
 /* ===== start - public domain SHA1 implementation ===== */