diff -u -r ../emacs-25.0.92/lisp/cus-start.el ./lisp/cus-start.el
--- ../emacs-25.0.92/lisp/cus-start.el	2016-03-02 05:21:42.000000000 -0500
+++ ./lisp/cus-start.el	2016-04-06 18:16:00.007272810 -0400
@@ -277,7 +277,7 @@
 			  "/tmp"))
 		     (t
 		      (or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP")
-			  "/tmp"))))
+			  "@TERMUX_PREFIX@/tmp"))))
 	      :initialize custom-initialize-delay)
 	     ;; fns.c
 	     (use-dialog-box menu boolean "21.1")