diff --git a/wolfssl/wolfcrypt/hash.h b/wolfssl/wolfcrypt/hash.h
index 5c1a6d661a..5738842133 100644
--- a/wolfssl/wolfcrypt/hash.h
+++ b/wolfssl/wolfcrypt/hash.h
@@ -94,7 +94,10 @@ enum wc_HashFlags {
 };
 
 #ifndef NO_HASH_WRAPPER
-typedef union {
+typedef struct {
+#if HAVE_ANONYMOUS_INLINE_AGGREGATES
+    union {
+#endif
     #ifndef NO_MD5
         wc_Md5 md5;
     #endif
@@ -119,6 +122,9 @@ typedef union {
     #ifdef WOLFSSL_SM3
         wc_Sm3 sm3;
     #endif
+#if HAVE_ANONYMOUS_INLINE_AGGREGATES
+    };
+#endif
     unsigned int isAllocated:1; /* flag indicates if structure was allocated */
 } wc_HashAlg;
 #endif /* !NO_HASH_WRAPPER */