diff --git a/include/mbedtls/check_config.h b/include/mbedtls/check_config.h
index 9f1ca2b..2673229 100644
--- a/include/mbedtls/check_config.h
+++ b/include/mbedtls/check_config.h
@@ -730,8 +730,8 @@
 #if !defined(MBEDTLS_SHA512_C)
 #error "MBEDTLS_SHA512_USE_A64_CRYPTO_* defined without MBEDTLS_SHA512_C"
 #endif
-#if defined(MBEDTLS_SHA512_ALT) || defined(MBEDTLS_SHA512_PROCESS_ALT)
-#error "MBEDTLS_SHA512_*ALT can't be used with MBEDTLS_SHA512_USE_A64_CRYPTO_*"
+#if defined(MBEDTLS_SHA512_PROCESS_ALT)
+#error "MBEDTLS_SHA512_PROCESS_ALT can't be used with MBEDTLS_SHA512_USE_A64_CRYPTO_*"
 #endif
 
 #endif /* MBEDTLS_SHA512_USE_A64_CRYPTO_IF_PRESENT || MBEDTLS_SHA512_USE_A64_CRYPTO_ONLY */
diff --git a/include/mbedtls/mbedtls_config.h b/include/mbedtls/mbedtls_config.h
index 762ca8b..3afc99b 100644
--- a/include/mbedtls/mbedtls_config.h
+++ b/include/mbedtls/mbedtls_config.h
@@ -350,8 +350,6 @@
  */
 //#define MBEDTLS_TIMING_ALT
 
-//#define MBEDTLS_SHA512_ALT
-
 /**
  * \def MBEDTLS_SHA256_PROCESS_ALT
  *