diff --git a/rigs/kenwood/kenwood.c b/rigs/kenwood/kenwood.c
index fe301968f..c74cd7d87 100644
--- a/rigs/kenwood/kenwood.c
+++ b/rigs/kenwood/kenwood.c
@@ -710,7 +710,7 @@ int kenwood_safe_transaction(RIG *rig, const char *cmd, char *buf,
     {
         size_t length;
         // some PowerSDR commands have variable len
-        int checklen =  !RIG_IS_POWERSDR;
+        int checklen =  !RIG_IS_POWERSDR && !RIG_IS_THETIS;
         err = kenwood_transaction(rig, cmd, buf, buf_size);
 
         if (err != RIG_OK)        /* return immediately on error as any
@@ -5052,7 +5052,7 @@ int kenwood_get_trn(RIG *rig, int *trn)
 
     /* these rigs only have AI[0|1] set commands and no AI query */
     if (RIG_IS_TS450S || RIG_IS_TS690S || RIG_IS_TS790 || RIG_IS_TS850
-            || RIG_IS_TS950S || RIG_IS_TS950SDX || RIG_IS_POWERSDR)
+            || RIG_IS_TS950S || RIG_IS_TS950SDX || RIG_IS_POWERSDR || RIG_IS_THETIS)
     {
         RETURNFUNC(-RIG_ENAVAIL);
     }
diff --git a/rigs/kenwood/kenwood.h b/rigs/kenwood/kenwood.h
index 338535b35..5ab2e64f0 100644
--- a/rigs/kenwood/kenwood.h
+++ b/rigs/kenwood/kenwood.h
@@ -28,7 +28,7 @@
 #include "token.h"
 #include "idx_builtin.h"
 
-#define BACKEND_VER "20231112"
+#define BACKEND_VER "20231226"
 
 #define EOM_KEN ';'
 #define EOM_TH '\r'
@@ -109,6 +109,7 @@ extern struct confparams kenwood_cfg_params[];
 #define RIG_IS_XG3       (rig->caps->rig_model == RIG_MODEL_XG3)
 #define RIG_IS_PT8000A   (rig->caps->rig_model == RIG_MODEL_PT8000A)
 #define RIG_IS_POWERSDR  (rig->caps->rig_model == RIG_MODEL_POWERSDR)
+#define RIG_IS_THETIS  (rig->caps->rig_model == RIG_MODEL_THETIS)
 #define RIG_IS_MALACHITE (rig->caps->rig_model == RIG_MODEL_MALACHITE)
 #define RIG_IS_QRPLABS (rig->caps->rig_model == RIG_MODEL_QRPLABS)