*** a/configure	2017-01-21 21:48:35.077000000 +0000
--- b/configure	2017-01-21 21:50:50.700000000 +0000
***************
*** 35496,35505 ****
  #include <string.h>
  #include <zlib.h>
  int main() {
! #ifdef ZLIB_VERSION
! /* Work around Debian bug: it uses 1.2.3.4 even though there was no such
!    version on the master site zlib.net */
!   exit(strncmp(ZLIB_VERSION, "1.2.5", 5) < 0);
  #else
    exit(1);
  #endif
--- 35496,35509 ----
  #include <string.h>
  #include <zlib.h>
  int main() {
! /* Checking ZLIB_VERNUM trick learned here:
!  * https://github.com/TransitApp/protobuf/blob/master/configure.ac#L95
!  */
! #ifdef ZLIB_VERNUM
!   if (ZLIB_VERNUM < 0x1250) {
!     exit(1);
!   }
!   exit(0);
  #else
    exit(1);
  #endif