diff --git a/ed25519/src/seed.cpp b/ed25519/src/seed.cpp
index e6478a293..63244cbbd 100644
--- a/ed25519/src/seed.cpp
+++ b/ed25519/src/seed.cpp
@@ -8,7 +8,7 @@
 
 #ifndef ED25519_NO_SEED
 
-#ifdef TORRENT_WINRT
+#if TORRENT_USE_CRYPTOGRAPHIC_BUFFER
 #include <robuffer.h>
 #include <wrl/client.h>
 using namespace Windows::Security::Cryptography;
@@ -22,7 +22,7 @@ using namespace Microsoft::WRL;
 #endif
 
 void ed25519_create_seed(unsigned char *seed) {
-#ifdef TORRENT_WINRT
+#if TORRENT_USE_CRYPTOGRAPHIC_BUFFER
     IBuffer^ seedBuffer = CryptographicBuffer::GenerateRandom(32);
     ComPtr<IBufferByteAccess> bufferByteAccess;
     reinterpret_cast<IInspectable*>(seedBuffer)->QueryInterface(IID_PPV_ARGS(&bufferByteAccess));
diff --git a/include/libtorrent/config.hpp b/include/libtorrent/config.hpp
index 78ec62660..d59c6192b 100644
--- a/include/libtorrent/config.hpp
+++ b/include/libtorrent/config.hpp
@@ -280,6 +280,7 @@ POSSIBILITY OF SUCH DAMAGE.
 # if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP) \
   && !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
 #  define TORRENT_WINRT
+#  define TORRENT_USE_CRYPTOGRAPHIC_BUFFER 1
 # endif
 #endif