diff --git a/include/mbedtls/ssl_internal.h b/include/mbedtls/ssl_internal.h
index b8c7f0a..5f7dc73 100644
--- a/include/mbedtls/ssl_internal.h
+++ b/include/mbedtls/ssl_internal.h
@@ -1063,4 +1063,6 @@
                              mbedtls_ssl_transform *transform,
                              mbedtls_record *rec );
 
+
+void mbedtls_ssl_set_timer( mbedtls_ssl_context *ssl, uint32_t millisecs );
 #endif /* ssl_internal.h */