diff --git a/util/hb-info.cc b/util/hb-info.cc
index b3a8b35..e386124 100644
--- a/util/hb-info.cc
+++ b/util/hb-info.cc
@@ -847,6 +847,7 @@ struct info_t :
       {
 	hb_codepoint_t gid = 0;
 	bool b = hb_font_get_variation_glyph (font, u, vs, &gid);
+	(void)b;
 	assert (b);
 
 	char glyphname[64];