diff --git a/patches/windows_headers.patch b/patches/windows_headers.patch
index cfbed956b6..0e9428c152 100644
--- a/patches/windows_headers.patch
+++ b/patches/windows_headers.patch
@@ -19,7 +19,7 @@ diff -u include/openssl.orig/dtls1.h include/openssl/dtls1.h
  #include <openssl/opensslfeatures.h>
  /* crypto/opensslconf.h.in */
 
-+#if defined(_MSC_VER) && !defined(__attribute__)
++#if defined(_MSC_VER) && !defined(__clang__) && !defined(__attribute__)
 +#define __attribute__(a)
 +#endif
 +