diff --git a/src/hb-face.cc b/src/hb-face.cc
index 7aa89fcadb50c3c14a51a2ef684339ee5016ca56..9effc41c8878851b7ebcf773d114877a26dcca01 100644
--- a/src/hb-face.cc
+++ b/src/hb-face.cc
@@ -113,7 +113,7 @@ _hb_face_for_data_closure_create (hb_blob_t *blob, unsigned int index)
 {
   hb_face_for_data_closure_t *closure;
 
-  closure = (hb_face_for_data_closure_t *) malloc (sizeof (hb_face_for_data_closure_t));
+  closure = (hb_face_for_data_closure_t *) calloc (1, sizeof (hb_face_for_data_closure_t));
   if (unlikely (!closure))
     return NULL;
 
diff --git a/src/hb-shape-plan.cc b/src/hb-shape-plan.cc
index 1d94c520bd427e926d5b53706e8d234fea79537f..56e2ea5c19254c1f94e696efba5b01151446ec66 100644
--- a/src/hb-shape-plan.cc
+++ b/src/hb-shape-plan.cc
@@ -128,7 +128,7 @@ hb_shape_plan_create (hb_face_t                     *face,
     face = hb_face_get_empty ();
   if (unlikely (!props))
     return hb_shape_plan_get_empty ();
-  if (num_user_features && !(features = (hb_feature_t *) malloc (num_user_features * sizeof (hb_feature_t))))
+  if (num_user_features && !(features = (hb_feature_t *) calloc (num_user_features, sizeof (hb_feature_t))))
     return hb_shape_plan_get_empty ();
   if (!(shape_plan = hb_object_create<hb_shape_plan_t> ())) {
     free (features);
diff --git a/src/hb-shaper.cc b/src/hb-shaper.cc
index 580b95c84b4d0d30d9da923a6349d6a34a3ebeb6..b25566d8a7cf0e662bf3c1962b5026795e3ef7a0 100644
--- a/src/hb-shaper.cc
+++ b/src/hb-shaper.cc
@@ -64,7 +64,7 @@ retry:
     }
 
     /* Not found; allocate one. */
-    shapers = (hb_shaper_pair_t *) malloc (sizeof (all_shapers));
+    shapers = (hb_shaper_pair_t *) calloc (1, sizeof (all_shapers));
     if (unlikely (!shapers)) {
       (void) hb_atomic_ptr_cmpexch (&static_shapers, NULL, &all_shapers[0]);
       return (const hb_shaper_pair_t *) all_shapers;