diff --git a/src/hb-ot-color-cbdt-table.hh b/src/hb-ot-color-cbdt-table.hh
index 3498d3b36..0914b5781 100644
--- a/src/hb-ot-color-cbdt-table.hh
+++ b/src/hb-ot-color-cbdt-table.hh
@@ -56,7 +56,7 @@ struct SmallGlyphMetrics
     extents->x_bearing = font->em_scale_x (bearingX);
     extents->y_bearing = font->em_scale_y (bearingY);
     extents->width = font->em_scale_x (width);
-    extents->height = font->em_scale_y (-height);
+    extents->height = font->em_scale_y (-static_cast<int>(height));
   }
 
   HBUINT8	height;