--- a/Modules/mmapmodule.c	2020-09-28 21:41:42.000000000 +0100
+++ b/Modules/mmapmodule.c	2020-09-28 21:42:35.000000000 +0100
@@ -527,11 +527,11 @@
 #endif /* MS_WINDOWS */
 
 #ifdef UNIX
-#ifndef HAVE_MREMAP
+//#ifndef HAVE_MREMAP
         PyErr_SetString(PyExc_SystemError,
                         "mmap: resizing not available--no mremap()");
         return NULL;
-#else
+/*#else
         void *newmap;
 
         if (self->fd != -1 && ftruncate(self->fd, self->offset + new_size) == -1) {
@@ -546,7 +546,7 @@
         newmap = mremap(self->data, self->size, self->data, new_size, 0);
 #else
         newmap = mremap(self->data, self->size, new_size, 0);
-#endif /* __NetBSD__ */
+#endif 
 #endif
         if (newmap == (void *)-1)
         {
@@ -556,7 +556,7 @@
         self->data = newmap;
         self->size = new_size;
         Py_RETURN_NONE;
-#endif /* HAVE_MREMAP */
+#endif */
 #endif /* UNIX */
     }
 }