diff --git a/include/openssl/sha.h b/include/openssl/sha.h
index 42875f15..423510df 100644
--- a/include/openssl/sha.h
+++ b/include/openssl/sha.h
@@ -98,8 +98,11 @@ OPENSSL_EXPORT uint8_t *SHA1(const uint8_t *data, size_t len, uint8_t *out);
 OPENSSL_EXPORT void SHA1_Transform(SHA_CTX *sha, const uint8_t *block);
 
 struct sha_state_st {
+#if defined(OPENSSL_WINDOWS)
+  uint32_t h[5];
+#else
   /* wpa_supplicant accesses |h0|..|h4| so we must support those names
-   * for compatibility. */
+   * for compatibility with it until it can be updated. */
   union {
     uint32_t h[5];
     struct {
@@ -110,7 +113,7 @@ struct sha_state_st {
       uint32_t h4;
     };
   };
-
+#endif
   uint32_t Nl, Nh;
   uint32_t data[16];
   unsigned int num;