--- a/mercurial/cext/manifest.c	Tue Apr 21 16:02:23 2015 -0400
+++ b/mercurial/cext/manifest.c	Mon Oct 16 14:49:35 2017 -0400
@@ -262,7 +262,7 @@
 #endif
 
 static PyTypeObject lazymanifestEntriesIterator = {
-	PyVarObject_HEAD_INIT(NULL, 0)
+	PyVarObject_HEAD_INIT(NULL, 0) /* header */
 	"parsers.lazymanifest.entriesiterator", /*tp_name */
 	sizeof(lmIter),                  /*tp_basicsize */
 	0,                               /*tp_itemsize */
@@ -310,7 +310,7 @@
 #endif
 
 static PyTypeObject lazymanifestKeysIterator = {
-	PyVarObject_HEAD_INIT(NULL, 0)
+	PyVarObject_HEAD_INIT(NULL, 0) /* header */
 	"parsers.lazymanifest.keysiterator", /*tp_name */
 	sizeof(lmIter),                  /*tp_basicsize */
 	0,                               /*tp_itemsize */
@@ -890,7 +890,7 @@
 #endif
 
 static PyTypeObject lazymanifestType = {
-	PyVarObject_HEAD_INIT(NULL, 0)
+	PyVarObject_HEAD_INIT(NULL, 0) /* header */
 	"parsers.lazymanifest",                           /* tp_name */
 	sizeof(lazymanifest),                             /* tp_basicsize */
 	0,                                                /* tp_itemsize */