diff --git a/jasper-exports.patch b/jasper-exports.patch
index 81d17d7..86e076f 100644
--- a/jasper-exports.patch
+++ b/jasper-exports.patch
@@ -1,6 +1,6 @@
 diff -rupN jasper-version-2.0.16/src/libjasper/include/jasper/jas_image.h jasper-version-2.0.16-new/src/libjasper/include/jasper/jas_image.h
 --- jasper-version-2.0.16/src/libjasper/include/jasper/jas_image.h	2019-03-12 19:04:35.000000000 +0100
-+++ jasper-version-2.0.16-new/src/libjasper/include/jasper/jas_image.h	2019-10-09 10:28:58.123940616 +0200
++++ jasper-version-2.0.16-new/src/libjasper/include/jasper/jas_image.h	2019-11-13 21:46:30.322873908 +0100
 @@ -496,10 +496,10 @@ int jas_image_ishomosamp(jas_image_t *im
  int jas_image_sampcmpt(jas_image_t *image, int cmptno, int newcmptno,
    jas_image_coord_t ho, jas_image_coord_t vo, jas_image_coord_t hs,
@@ -14,3 +14,36 @@ diff -rupN jasper-version-2.0.16/src/libjasper/include/jasper/jas_image.h jasper
    jas_image_coord_t y, jas_image_coord_t width, jas_image_coord_t height,
    long *buf);
  
+@@ -549,23 +549,23 @@ int bmp_validate(jas_stream_t *in);
+ 
+ #if !defined(EXCLUDE_JP2_SUPPORT)
+ /* Format-dependent operations for JP2 support. */
+-jas_image_t *jp2_decode(jas_stream_t *in, const char *optstr);
+-int jp2_encode(jas_image_t *image, jas_stream_t *out, const char *optstr);
+-int jp2_validate(jas_stream_t *in);
++JAS_DLLEXPORT jas_image_t *jp2_decode(jas_stream_t *in, const char *optstr);
++JAS_DLLEXPORT int jp2_encode(jas_image_t *image, jas_stream_t *out, const char *optstr);
++JAS_DLLEXPORT int jp2_validate(jas_stream_t *in);
+ #endif
+ 
+ #if !defined(EXCLUDE_JPC_SUPPORT)
+ /* Format-dependent operations for JPEG-2000 code stream support. */
+-jas_image_t *jpc_decode(jas_stream_t *in, const char *optstr);
+-int jpc_encode(jas_image_t *image, jas_stream_t *out, const char *optstr);
+-int jpc_validate(jas_stream_t *in);
++JAS_DLLEXPORT jas_image_t *jpc_decode(jas_stream_t *in, const char *optstr);
++JAS_DLLEXPORT int jpc_encode(jas_image_t *image, jas_stream_t *out, const char *optstr);
++JAS_DLLEXPORT int jpc_validate(jas_stream_t *in);
+ #endif
+ 
+ #if !defined(EXCLUDE_PGX_SUPPORT)
+ /* Format-dependent operations for PGX support. */
+-jas_image_t *pgx_decode(jas_stream_t *in, const char *optstr);
+-int pgx_encode(jas_image_t *image, jas_stream_t *out, const char *optstr);
+-int pgx_validate(jas_stream_t *in);
++JAS_DLLEXPORT jas_image_t *pgx_decode(jas_stream_t *in, const char *optstr);
++JAS_DLLEXPORT int pgx_encode(jas_image_t *image, jas_stream_t *out, const char *optstr);
++JAS_DLLEXPORT int pgx_validate(jas_stream_t *in);
+ #endif
+ 
+ #ifdef __cplusplus
diff --git a/mingw-jasper.spec b/mingw-jasper.spec
index ad23f69..b58ba68 100644
--- a/mingw-jasper.spec
+++ b/mingw-jasper.spec
@@ -2,7 +2,7 @@
 
 Name:           mingw-jasper
 Version:        2.0.16
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        MinGW Windows Jasper library
 
 License:        JasPer
@@ -124,6 +124,9 @@ rmdir %{buildroot}%{mingw64_datadir}
 
 
 %changelog
+* Wed Nov 13 2019 Sandro Mani <manisandro@gmail.com> - 2.0.16-4
+- Export some additional symbols, needed by mingw-gdal
+
 * Wed Oct 09 2019 Sandro Mani <manisandro@gmail.com> - 2.0.16-3
 - Export some additional symbols, needed by mingw-gstreamer-plugins-bad-free