diff --git a/src/hb-ot-shape-complex-private.hh b/src/hb-ot-shape-complex-private.hh
index a3796b495..788d18aa6 100644
--- a/src/hb-ot-shape-complex-private.hh
+++ b/src/hb-ot-shape-complex-private.hh
@@ -41,6 +41,7 @@ hb_ot_shape_complex_categorize (const hb_segment_properties_t *props)
     case HB_SCRIPT_ARABIC:
     case HB_SCRIPT_NKO:
     case HB_SCRIPT_SYRIAC:
+    case HB_SCRIPT_MANDAIC:
       return hb_ot_complex_shaper_arabic;
 
     default: