diff --git a/library/xtea.c b/library/xtea.c
index c66bdd4..572936d 100644
--- a/library/xtea.c
+++ b/library/xtea.c
@@ -245,7 +245,7 @@
         if( verbose != 0 )
             mbedtls_printf( "  XTEA test #%d: ", i + 1 );
 
-        mbedtls_platform_memcpy( buf, xtea_test_pt[i], 8 );
+        memcpy( buf, xtea_test_pt[i], 8 );
 
         mbedtls_xtea_setup( &ctx, xtea_test_key[i] );
         mbedtls_xtea_crypt_ecb( &ctx, MBEDTLS_XTEA_ENCRYPT, buf, buf );