kc3-lang/freetype

diff --git a/ChangeLog b/ChangeLog
index 6bbb957..471b5c8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,22 @@
+2020-03-02  Moazin Khatti  <moazinkhatri@gmail.com>
+
+	[gzip] Support `gzip' encoded header conditionally.
+
+	In order to support `gzip' encoded header the call to
+	`inflateInit2' was modified in commit 6a92b1fadde26477a9179.
+	However, this code breaks with the outdated internal version
+	of zlib.  This is a temporary fix to conditionally support
+	`gzip' encoded header whenever a system installation of zlib
+	is being used.
+
+	Problem report in
+
+	  https://lists.nongnu.org/archive/html/freetype-devel/2020-02/msg00023.html
+
+	* src/gzip/ftgzip.c (FT_Gzip_Uncompress): Change the the call to
+	`inflateInit2' depending on whether the system installation is
+	being used or the internal copy.
+
 2020-02-29  Ben Wagner  <bungeman@google.com>
 
 	[truetype] Fix state of `FT_Face' for buggy `gvar' tables (#57923).
diff --git a/src/gzip/ftgzip.c b/src/gzip/ftgzip.c
index d192b10..6b1df3a 100644
--- a/src/gzip/ftgzip.c
+++ b/src/gzip/ftgzip.c
@@ -746,7 +746,17 @@
     stream.zfree  = (free_func) ft_gzip_free;
     stream.opaque = memory;
 
+    /* This is a temporary fix and will be removed once the internal
+     * copy of zlib is updated to the newest version. The `|32' flag
+     * is only supported in the new versions of zlib to enable gzip
+     * encoded header.
+     */
+#ifdef FT_CONFIG_OPTION_SYSTEM_ZLIB
     err = inflateInit2( &stream, MAX_WBITS|32 );
+#else
+    err = inflateInit2( &stream, MAX_WBITS );
+#endif
+
     if ( err != Z_OK )
       return FT_THROW( Invalid_Argument );