#define wxUSE_ZIPSTREAM 1
// Set to 1 to compile wxZlibInput/OutputStream classes. Also required by
-// wxUSE_LIBPNG.
+// wxUSE_LIBPNG and wxUSE_GZSTREAM.
#define wxUSE_ZLIB 1
+// Set to 1 to compile wxGzipInput/OutputStream classes. Requires wxUSE_ZLIB.
+#define wxUSE_GZSTREAM 1
+
// If enabled, the code written by Apple will be used to write, in a portable
// way, float on the disk. See extended.c for the license which is different
// from wxWindows one.