diff --git a/include/mbedtls/ssl_internal.h b/include/mbedtls/ssl_internal.h
index fad78d9..025c3a9 100644
--- a/include/mbedtls/ssl_internal.h
+++ b/include/mbedtls/ssl_internal.h
@@ -1075,6 +1075,7 @@
     return( 0 );
 }
 
+int mbedtls_ssl_resend_hello_request( mbedtls_ssl_context *ssl );
 
 void mbedtls_ssl_set_timer( mbedtls_ssl_context *ssl, uint32_t millisecs );
 int mbedtls_ssl_check_timer( mbedtls_ssl_context *ssl );