diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index 20d9c74..6dfa9f4 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -1069,8 +1069,7 @@
     /*
      * SNI extension
      */
-    unsigned char *hostname;
-    size_t         hostname_len;
+    char *hostname;
 #endif
 
 #if defined(MBEDTLS_SSL_ALPN)