diff --git a/src/hb-coretext.cc b/src/hb-coretext.cc
index 99b33c001..29d258aa5 100644
--- a/src/hb-coretext.cc
+++ b/src/hb-coretext.cc
@@ -648,7 +648,7 @@ _hb_coretext_shape (hb_shape_plan_t    *shape_plan,
       } else {
 	active_feature_t *feature = active_features.lsearch (event->feature);
 	if (feature)
-	  active_features.remove (feature - active_features.arrayZ);
+	  active_features.remove_ordered (feature - active_features.arrayZ);
       }
     }
   }
diff --git a/src/hb-ms-feature-ranges.hh b/src/hb-ms-feature-ranges.hh
index d40fdeaa8..46a20c91e 100644
--- a/src/hb-ms-feature-ranges.hh
+++ b/src/hb-ms-feature-ranges.hh
@@ -166,7 +166,7 @@ hb_ms_setup_features (const hb_feature_t                *features,
     {
       auto *feature = active_features.lsearch (event->feature);
       if (feature)
-        active_features.remove (feature - active_features.arrayZ);
+        active_features.remove_ordered (feature - active_features.arrayZ);
     }
   }