diff --git a/library/pkcs5.c b/library/pkcs5.c
index f04f0ab..5013343 100644
--- a/library/pkcs5.c
+++ b/library/pkcs5.c
@@ -54,22 +54,7 @@
 #define mbedtls_printf printf
 #endif
 
-#if !defined(MBEDTLS_ASN1_PARSE_C)
-int mbedtls_pkcs5_pbes2( const mbedtls_asn1_buf *pbe_params, int mode,
-                 const unsigned char *pwd,  size_t pwdlen,
-                 const unsigned char *data, size_t datalen,
-                 unsigned char *output )
-{
-    ((void) pbe_params);
-    ((void) mode);
-    ((void) pwd);
-    ((void) pwdlen);
-    ((void) data);
-    ((void) datalen);
-    ((void) output);
-    return( MBEDTLS_ERR_PKCS5_FEATURE_UNAVAILABLE );
-}
-#else
+#if defined(MBEDTLS_ASN1_PARSE_C)
 static int pkcs5_parse_pbkdf2_params( const mbedtls_asn1_buf *params,
                                       mbedtls_asn1_buf *salt, int *iterations,
                                       int *keylen, mbedtls_md_type_t *md_type )