diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index 4aec9ac..b80667a 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -1129,6 +1129,17 @@
 #define MBEDTLS_SSL_ALL_ALERT_MESSAGES
 
 /**
+ * \def MBEDTLS_SSL_ASYNC_PRIVATE
+ *
+ * Enable asynchronous external private key operations in SSL. This allows
+ * you to configure an SSL connection to call an external cryptographic
+ * module to perform private key operations instead of performing the
+ * operation inside the library.
+ *
+ */
+//#define MBEDTLS_SSL_ASYNC_PRIVATE
+
+/**
  * \def MBEDTLS_SSL_DEBUG_ALL
  *
  * Enable the debug messages in SSL module for all issues.
@@ -2473,17 +2484,6 @@
 #define MBEDTLS_SHA512_C
 
 /**
- * \def MBEDTLS_SSL_ASYNC_PRIVATE_C
- *
- * Enable asynchronous external private key operations in SSL. This allows
- * you to configure an SSL connection to call an external cryptographic
- * module to perform private key operations instead of performing the
- * operation inside the library.
- *
- */
-//#define MBEDTLS_SSL_ASYNC_PRIVATE_C
-
-/**
  * \def MBEDTLS_SSL_CACHE_C
  *
  * Enable simple SSL cache implementation.
diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index 582be2c..be27b89 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -537,7 +537,7 @@
  */
 typedef int mbedtls_ssl_get_timer_t( void * ctx );
 
-#if defined(MBEDTLS_SSL_ASYNC_PRIVATE_C)
+#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
 /**
  * \brief           Callback type: start external signature operation
@@ -692,7 +692,7 @@
  */
 typedef void mbedtls_ssl_async_cancel_t( void *connection_ctx,
                                          void *operation_ctx );
-#endif /* MBEDTLS_SSL_ASYNC_PRIVATE_C */
+#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
 
 /* Defined below */
 typedef struct mbedtls_ssl_session mbedtls_ssl_session;
@@ -826,7 +826,7 @@
     mbedtls_x509_crl *ca_crl;       /*!< trusted CAs CRLs                   */
 #endif /* MBEDTLS_X509_CRT_PARSE_C */
 
-#if defined(MBEDTLS_SSL_ASYNC_PRIVATE_C)
+#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
     mbedtls_ssl_async_sign_t *f_async_sign_start; /*!< start asynchronous signature operation */
     mbedtls_ssl_async_decrypt_t *f_async_decrypt_start; /*!< start asynchronous decryption operation */
@@ -834,7 +834,7 @@
     mbedtls_ssl_async_resume_t *f_async_resume; /*!< resume asynchronous operation */
     mbedtls_ssl_async_cancel_t *f_async_cancel; /*!< cancel asynchronous operation */
     void *p_async_connection_ctx; /*!< connection context for asynchronous operation callbacks  */
-#endif /* MBEDTLS_SSL_ASYNC_PRIVATE_C */
+#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
 
 #if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
     const int *sig_hashes;          /*!< allowed signature hashes           */
@@ -1482,7 +1482,7 @@
         void *p_export_keys );
 #endif /* MBEDTLS_SSL_EXPORT_KEYS */
 
-#if defined(MBEDTLS_SSL_ASYNC_PRIVATE_C)
+#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
 /**
  * \brief           Configure asynchronous private key operation callbacks.
  *
@@ -1514,7 +1514,7 @@
                                         mbedtls_ssl_async_resume_t *f_async_resume,
                                         mbedtls_ssl_async_cancel_t *f_async_cancel,
                                         void *connection_ctx );
-#endif /* MBEDTLS_SSL_ASYNC_PRIVATE_C */
+#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
 
 /**
  * \brief          Callback type: generate a cookie
diff --git a/include/mbedtls/ssl_internal.h b/include/mbedtls/ssl_internal.h
index 6f36711..4c7205d 100644
--- a/include/mbedtls/ssl_internal.h
+++ b/include/mbedtls/ssl_internal.h
@@ -243,9 +243,9 @@
     mbedtls_x509_crl *sni_ca_crl;       /*!< trusted CAs CRLs from SNI      */
 #endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
 #endif /* MBEDTLS_X509_CRT_PARSE_C */
-#if defined(MBEDTLS_SSL_ASYNC_PRIVATE_C)
+#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
     void *p_async_operation_ctx;        /*!< asynchronous operation context */
-#endif /* MBEDTLS_SSL_ASYNC_PRIVATE_C */
+#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
 
 #if defined(MBEDTLS_SSL_PROTO_DTLS)
     unsigned int out_msg_seq;           /*!<  Outgoing handshake sequence number */