diff --git a/cad/gds3d/files/patch-manual-gds_globals.h b/cad/gds3d/files/patch-manual-gds_globals.h
new file mode 100644
index 000000000000..f652a732d58b
--- /dev/null
+++ b/cad/gds3d/files/patch-manual-gds_globals.h
@@ -0,0 +1,17 @@
+- workaround for error: reference to 'byte' is ambiguous, see https://github.com/trilomix/GDS3D/issues/23
+
+--- ../libgdsto3d/gds_globals.h.orig	2023-07-09 01:42:32.116154000 -0700
++++ ../libgdsto3d/gds_globals.h	2023-07-09 01:42:59.001193000 -0700
+@@ -116,9 +116,9 @@
+ 
+ typedef struct gds_header{
+ 	short RecordLength;
+-	byte RecordType;
+-	byte DataType;
+-	byte *Data;
++	::byte RecordType;
++	::byte DataType;
++	::byte *Data;
+ }gds_header;
+ 
+ /* A word consists of 16 bits, numbered from 0 to 15, left to right. */