diff --git a/src/hb-ft.cc b/src/hb-ft.cc
index 497fde7c4..6af4e065e 100644
--- a/src/hb-ft.cc
+++ b/src/hb-ft.cc
@@ -400,8 +400,6 @@ hb_ft_font_set_funcs (hb_font_t *font)
     return;
   }
 
-  hb_font_make_immutable (font);
-
   FT_Set_Char_Size (ft_face,
 		    font->x_scale, font->y_scale,
 		    font->x_ppem * 72 * 64 / font->x_scale,