diff --git a/src/hb-ot-shape.cc b/src/hb-ot-shape.cc
index 64aa74a9d..bbdfc214a 100644
--- a/src/hb-ot-shape.cc
+++ b/src/hb-ot-shape.cc
@@ -91,9 +91,11 @@ hb_ot_shape_planner_t::hb_ot_shape_planner_t (hb_face_t                     *fac
   script_zero_marks = shaper->zero_width_marks != HB_OT_SHAPE_ZERO_WIDTH_MARKS_NONE;
   script_fallback_mark_positioning = shaper->fallback_position;
 
+#ifndef HB_NO_AAT_SHAPE
   /* https://github.com/harfbuzz/harfbuzz/issues/1528 */
   if (apply_morx && shaper != &_hb_ot_shaper_default)
     shaper = &_hb_ot_shaper_dumber;
+#endif
 }
 
 void
diff --git a/src/hb-ot-shaper-default.cc b/src/hb-ot-shaper-default.cc
index 2f6f499ee..f0404a4d2 100644
--- a/src/hb-ot-shaper-default.cc
+++ b/src/hb-ot-shaper-default.cc
@@ -49,6 +49,7 @@ const hb_ot_shaper_t _hb_ot_shaper_default =
   true, /* fallback_position */
 };
 
+#ifndef HB_NO_AAT_SHAPE
 /* Same as default but no mark advance zeroing / fallback positioning.
  * Dumbest shaper ever, basically. */
 const hb_ot_shaper_t _hb_ot_shaper_dumber =
@@ -68,6 +69,7 @@ const hb_ot_shaper_t _hb_ot_shaper_dumber =
   HB_OT_SHAPE_ZERO_WIDTH_MARKS_NONE,
   false, /* fallback_position */
 };
+#endif
 
 
 #endif