diff --git a/src/libsodium/sodium/core.c b/src/libsodium/sodium/core.c
index f2c39b13..31631f6d 100644
--- a/src/libsodium/sodium/core.c
+++ b/src/libsodium/sodium/core.c
@@ -9,7 +9,7 @@
 #include "runtime.h"
 #include "utils.h"
 
-#if 1
+#if !defined(_MSC_VER) && 1
 # warning This is unstable, untested, development code.
 # warning It might not compile. It might not work as expected.
 # warning It might be totally insecure.