--- crypto/hmac/hmac.c
+++ crypto/hmac/hmac.c
@@ -169,4 +169,13 @@
     EVP_MD_CTX_set_flags(&ctx->md_ctx, flags);
 }
 
+// Define alias names for compatibility with AVMs libcrypto
+#define	DEFINE_ALIAS(n)	extern __typeof (n) ossl_##n __attribute__ ((alias (#n)));
+
+DEFINE_ALIAS (HMAC);
+DEFINE_ALIAS (HMAC_Init);
+DEFINE_ALIAS (HMAC_Init_ex);
+DEFINE_ALIAS (HMAC_Update);
+DEFINE_ALIAS (HMAC_Final);
+
 #endif
