diff --git a/graphics/netpbm/files/patch-jasper b/graphics/netpbm/files/patch-jasper
new file mode 100644
index 000000000000..2151239155d8
--- /dev/null
+++ b/graphics/netpbm/files/patch-jasper
@@ -0,0 +1,22 @@
+--- converter/other/jpeg2000/jpeg2ktopam.c.orig	2020-07-22 20:35:17 UTC
++++ converter/other/jpeg2000/jpeg2ktopam.c
+@@ -17,6 +17,8 @@
+        but plenty of source files of libjasper do to0, and they did not have
+        _XOPEN_SOURCE 600, so it would seem to be superfluous here too.
+     */
++#include <stddef.h>
++typedef __max_align_t   max_align_t;
+ #include <string.h>
+ 
+ #include <jasper/jasper.h>
+--- converter/other/jpeg2000/pamtojpeg2k.c.orig	2020-07-22 20:35:17 UTC
++++ converter/other/jpeg2000/pamtojpeg2k.c
+@@ -18,6 +18,8 @@
+        _XOPEN_SOURCE 600, so it would seem to be superfluous here too.
+     */
+ 
++#include <stddef.h>
++typedef __max_align_t   max_align_t;
+ #include <string.h>
+ 
+ #include <jasper/jasper.h>