diff --git a/src/hb-ot-shape-complex-myanmar.cc b/src/hb-ot-shape-complex-myanmar.cc
index 4081ed0..8b8e417 100644
--- a/src/hb-ot-shape-complex-myanmar.cc
+++ b/src/hb-ot-shape-complex-myanmar.cc
@@ -103,7 +103,7 @@
   for (unsigned int i = 0; i < ARRAY_LENGTH (basic_features); i++)
   {
     map->add_feature (basic_features[i], 1, F_GLOBAL | F_MANUAL_ZWJ);
-    map->add_gsub_pause (NULL);
+    map->add_gsub_pause (nullptr);
   }
   map->add_gsub_pause (final_reordering);
   for (unsigned int i = 0; i < ARRAY_LENGTH (other_features); i++)
@@ -513,18 +513,18 @@
 const hb_ot_complex_shaper_t _hb_ot_complex_shaper_myanmar_old =
 {
   "default",
-  NULL, /* collect_features */
-  NULL, /* override_features */
-  NULL, /* data_create */
-  NULL, /* data_destroy */
-  NULL, /* preprocess_text */
-  NULL, /* postprocess_glyphs */
+  nullptr, /* collect_features */
+  nullptr, /* override_features */
+  nullptr, /* data_create */
+  nullptr, /* data_destroy */
+  nullptr, /* preprocess_text */
+  nullptr, /* postprocess_glyphs */
   HB_OT_SHAPE_NORMALIZATION_MODE_DEFAULT,
-  NULL, /* decompose */
-  NULL, /* compose */
-  NULL, /* setup_masks */
-  NULL, /* disable_otl */
-  NULL, /* reorder_marks */
+  nullptr, /* decompose */
+  nullptr, /* compose */
+  nullptr, /* setup_masks */
+  nullptr, /* disable_otl */
+  nullptr, /* reorder_marks */
   HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_LATE,
   true, /* fallback_position */
 };
@@ -534,16 +534,16 @@
   "myanmar",
   collect_features_myanmar,
   override_features_myanmar,
-  NULL, /* data_create */
-  NULL, /* data_destroy */
-  NULL, /* preprocess_text */
-  NULL, /* postprocess_glyphs */
+  nullptr, /* data_create */
+  nullptr, /* data_destroy */
+  nullptr, /* preprocess_text */
+  nullptr, /* postprocess_glyphs */
   HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS_NO_SHORT_CIRCUIT,
-  NULL, /* decompose */
-  NULL, /* compose */
+  nullptr, /* decompose */
+  nullptr, /* compose */
   setup_masks_myanmar,
-  NULL, /* disable_otl */
-  NULL, /* reorder_marks */
+  nullptr, /* disable_otl */
+  nullptr, /* reorder_marks */
   HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_EARLY,
   false, /* fallback_position */
 };