diff -r fca5c4a63251 Include/py_curses.h
--- a/Include/py_curses.h	Thu Oct 06 14:32:10 2016 -0700
+++ b/Include/py_curses.h	Fri Oct 07 22:19:10 2016 +0900
@@ -7,7 +7,7 @@
 ** On Mac OS X 10.2 [n]curses.h and stdlib.h use different guards
 ** against multiple definition of wchar_t.
 */
-#ifdef	_BSD_WCHAR_T_DEFINED_
+#ifdef  _BSD_WCHAR_T_DEFINED_
 #define _WCHAR_T
 #endif
 
@@ -22,7 +22,7 @@
 ** On FreeBSD, [n]curses.h and stdlib.h/wchar.h use different guards
 ** against multiple definition of wchar_t and wint_t.
 */
-#ifdef	_XOPEN_SOURCE_EXTENDED
+#ifdef  _XOPEN_SOURCE_EXTENDED
 #ifndef __FreeBSD_version
 #include <osreldate.h>
 #endif
@@ -57,9 +57,6 @@
 #ifdef HAVE_NCURSES_H
 /* configure was checking <curses.h>, but we will
    use <ncurses.h>, which has all these features. */
-#ifndef WINDOW_HAS_FLAGS
-#define WINDOW_HAS_FLAGS 1
-#endif
 #ifndef MVWDELCH_IS_EXPRESSION
 #define MVWDELCH_IS_EXPRESSION 1
 #endif
@@ -74,12 +71,12 @@
 /* Type declarations */
 
 typedef struct {
-	PyObject_HEAD
-	WINDOW *win;
-	char *encoding;
+    PyObject_HEAD
+    WINDOW *win;
+    char *encoding;
 } PyCursesWindowObject;
 
-#define PyCursesWindow_Check(v)	 (Py_TYPE(v) == &PyCursesWindow_Type)
+#define PyCursesWindow_Check(v)  (Py_TYPE(v) == &PyCursesWindow_Type)
 
 #define PyCurses_CAPSULE_NAME "_curses._C_API"
 
diff -r fca5c4a63251 Modules/_cursesmodule.c
--- a/Modules/_cursesmodule.c	Thu Oct 06 14:32:10 2016 -0700
+++ b/Modules/_cursesmodule.c	Fri Oct 07 22:19:10 2016 +0900
@@ -930,6 +930,16 @@
 }
 #endif
 
+#ifdef HAVE_CURSES_IS_PAD
+#define py_is_pad(win)          is_pad(win)
+#else
+#ifdef WINDOW_HAS_FLAGS
+#define py_is_pad(win)          ((win) ? ((win)->_flags & _ISPAD) != 0 : FALSE)
+#else
+#define py_is_pad(win)          FALSE
+#endif
+#endif
+
 /* chgat, added by Fabian Kreutz <fabian.kreutz at gmx.net> */
 
 static PyObject *
@@ -1069,12 +1079,10 @@
     if (!PyCurses_ConvertToChtype(self, temp, &ch))
         return NULL;
 
-#ifdef WINDOW_HAS_FLAGS
-    if (self->win->_flags & _ISPAD)
+    if (py_is_pad(self->win))
         return PyCursesCheckERR(pechochar(self->win, ch | attr),
                                 "echochar");
     else
-#endif
         return PyCursesCheckERR(wechochar(self->win, ch | attr),
                                 "echochar");
 }
@@ -1606,11 +1614,7 @@
     int pminrow,pmincol,sminrow,smincol,smaxrow,smaxcol;
     int rtn;
 
-#ifndef WINDOW_HAS_FLAGS
-    if (0)
-#else
-        if (self->win->_flags & _ISPAD)
-#endif
+    if (py_is_pad(self->win))
         {
             switch(PyTuple_Size(args)) {
             case 6:
@@ -1781,11 +1785,7 @@
     int pminrow,pmincol,sminrow,smincol,smaxrow,smaxcol;
     int rtn;
 
-#ifndef WINDOW_HAS_FLAGS
-    if (0)
-#else
-        if (self->win->_flags & _ISPAD)
-#endif
+    if (py_is_pad(self->win))
         {
             switch(PyTuple_Size(args)) {
             case 6:
@@ -1850,11 +1850,9 @@
     }
 
     /* printf("Subwin: %i %i %i %i   \n", nlines, ncols, begin_y, begin_x); */
-#ifdef WINDOW_HAS_FLAGS
-    if (self->win->_flags & _ISPAD)
+    if (py_is_pad(self->win))
         win = subpad(self->win, nlines, ncols, begin_y, begin_x);
     else
-#endif
         win = subwin(self->win, nlines, ncols, begin_y, begin_x);
 
     if (win == NULL) {
diff -r fca5c4a63251 configure
--- a/configure	Thu Oct 06 14:32:10 2016 -0700
+++ b/configure	Fri Oct 07 22:19:10 2016 +0900
@@ -15814,6 +15814,37 @@
 
 fi
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for is_pad" >&5
+$as_echo_n "checking for is_pad... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <curses.h>
+int
+main ()
+{
+
+    bool b;
+    WINDOW *w;
+    b = is_pad(w);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+$as_echo "#define HAVE_CURSES_IS_PAD 1" >>confdefs.h
+
+   { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether WINDOW has _flags" >&5
 $as_echo_n "checking whether WINDOW has _flags... " >&6; }
 if ${ac_cv_window_has_flags+:} false; then :
diff -r fca5c4a63251 configure.ac
--- a/configure.ac	Thu Oct 06 14:32:10 2016 -0700
+++ b/configure.ac	Fri Oct 07 22:19:10 2016 +0900
@@ -4939,6 +4939,18 @@
   [Define if mvwdelch in curses.h is an expression.])
 fi
 
+AC_MSG_CHECKING(for is_pad)
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <curses.h>]], [[
+    bool b;
+    WINDOW *w;
+    b = is_pad(w);
+  ]])],
+  [AC_DEFINE(HAVE_CURSES_IS_PAD, 1,
+             [Define if you have the 'is_pad' function or macro.])
+   AC_MSG_RESULT(yes)],
+  [AC_MSG_RESULT(no)]
+)
+
 AC_MSG_CHECKING(whether WINDOW has _flags)
 AC_CACHE_VAL(ac_cv_window_has_flags,
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <curses.h>]], [[
diff -r fca5c4a63251 pyconfig.h.in
--- a/pyconfig.h.in	Thu Oct 06 14:32:10 2016 -0700
+++ b/pyconfig.h.in	Fri Oct 07 22:19:10 2016 +0900
@@ -149,6 +149,9 @@
 /* Define to 1 if you have the <curses.h> header file. */
 #undef HAVE_CURSES_H
 
+/* Define if you have the 'is_pad' function or macro. */
+#undef HAVE_CURSES_IS_PAD
+
 /* Define if you have the 'is_term_resized' function. */
 #undef HAVE_CURSES_IS_TERM_RESIZED