--- third_party/zlib/BUILD.gn.orig	2017-04-19 19:06:53 UTC
+++ third_party/zlib/BUILD.gn
@@ -115,7 +115,7 @@ static_library("minizip") {
       "contrib/minizip/iowin32.h",
     ]
   }
-  if (is_mac || is_ios || is_android) {
+  if (is_mac || is_ios || is_android || is_bsd) {
     # Mac, Android and the BSDs don't have fopen64, ftello64, or fseeko64. We
     # use fopen, ftell, and fseek instead on these systems.
     defines = [ "USE_FILE32API" ]