diff --git a/graphics/gmt/files/patch-src_grd2xyz.c b/graphics/gmt/files/patch-src_grd2xyz.c
new file mode 100644
index 000000000000..b4199a5ebfa9
--- /dev/null
+++ b/graphics/gmt/files/patch-src_grd2xyz.c
@@ -0,0 +1,10 @@
+--- src/grd2xyz.c.orig	2022-01-03 22:31:11 UTC
++++ src/grd2xyz.c
+@@ -23,6 +23,7 @@
+  * Version:	6 API
+  */
+ 
++#include "gmt_common_byteswap.h"
+ #include "gmt_dev.h"
+ 
+ #define THIS_MODULE_CLASSIC_NAME	"grd2xyz"