diff --git a/src/test.cc b/src/test.cc
index 22108b86b7a574729d3f41de5d25019908f29c2e..1acb6ead70b245c53b92b61b5fc3bfe40c27de52 100644
--- a/src/test.cc
+++ b/src/test.cc
@@ -100,6 +100,7 @@ main (int argc, char **argv)
   hb_buffer_t *buffer = hb_buffer_create ();
 
   hb_buffer_add_utf8 (buffer, "\xe0\xa4\x95\xe0\xa5\x8d\xe0\xa4\xb0\xe0\xa5\x8d\xe0\xa4\x95", -1, 0, -1);
+  hb_buffer_guess_segment_properties (buffer);
 
   hb_shape (font, buffer, NULL, 0);