diff --git a/include/hamlib/rotlist.h b/include/hamlib/rotlist.h
index 2bca46078..f3f3ce922 100644
--- a/include/hamlib/rotlist.h
+++ b/include/hamlib/rotlist.h
@@ -314,6 +314,7 @@
 #define ROT_MODEL_GS232A_EL ROT_MAKE_MODEL(ROT_GS232A, 10)
 #define ROT_MODEL_GS232B_AZ ROT_MAKE_MODEL(ROT_GS232A, 11)
 #define ROT_MODEL_GS232B_EL ROT_MAKE_MODEL(ROT_GS232A, 12)
+#define ROT_MODEL_GS23_AZ ROT_MAKE_MODEL(ROT_GS232A, 13)
 
 
 /**