--- gdal-2.1.3/frmts/jpeg2000/jpeg2000_vsil_io.h.orig	2017-03-31 17:06:52.996122910 +0200
+++ gdal-2.1.3/frmts/jpeg2000/jpeg2000_vsil_io.h	2017-03-31 17:07:06.356370202 +0200
@@ -34,4 +34,6 @@
 
 jas_stream_t *JPEG2000_VSIL_fopen(const char *filename, const char *mode);
 
+#define uchar unsigned char
+
 #endif