diff --git a/src/hb-subset-input.cc b/src/hb-subset-input.cc
index cca41a149..36e1587ea 100644
--- a/src/hb-subset-input.cc
+++ b/src/hb-subset-input.cc
@@ -225,6 +225,7 @@ hb_subset_input_destroy (hb_subset_input_t *input)
   hb_set_destroy (input->name_languages);
   hb_set_destroy (input->drop_tables);
   hb_set_destroy (input->layout_features);
+  hb_set_destroy (input->no_subset_tables);
 
   hb_free (input);
 }
diff --git a/src/hb-subset-plan.cc b/src/hb-subset-plan.cc
index fec5466d1..470917280 100644
--- a/src/hb-subset-plan.cc
+++ b/src/hb-subset-plan.cc
@@ -501,6 +501,7 @@ hb_subset_plan_destroy (hb_subset_plan_t *plan)
   hb_set_destroy (plan->layout_features);
   hb_set_destroy (plan->glyphs_requested);
   hb_set_destroy (plan->drop_tables);
+  hb_set_destroy (plan->no_subset_tables);
   hb_face_destroy (plan->source);
   hb_face_destroy (plan->dest);
   hb_map_destroy (plan->codepoint_to_glyph);