diff --git a/src/hb-font.hh b/src/hb-font.hh
index 08f9c5c4f..a8b3ee5c4 100644
--- a/src/hb-font.hh
+++ b/src/hb-font.hh
@@ -182,9 +182,9 @@ struct hb_font_t
   void scale_glyph_extents (hb_glyph_extents_t *extents)
   {
     extents->x_bearing = em_scale_x (extents->x_bearing);
-    extents->y_bearing = em_scale_x (extents->y_bearing);
+    extents->y_bearing = em_scale_y (extents->y_bearing);
     extents->width = em_scale_x (extents->width);
-    extents->height = em_scale_x (extents->height);
+    extents->height = em_scale_y (extents->height);
 
     /* Apply slant. */
     extents->x_bearing += roundf (extents->y_bearing * slant_xy);