diff --git a/include/hamlib/rig.h b/include/hamlib/rig.h
index 510031f76..fd461a4b7 100644
--- a/include/hamlib/rig.h
+++ b/include/hamlib/rig.h
@@ -1386,12 +1386,12 @@ typedef uint64_t rmode_t;
 #define    RIG_MODE_IQ        CONSTANT_64BIT_FLAG (37)  /*!< \c IQ mode for a couple of kit rigs */
 #define    RIG_MODE_ISBUSB    CONSTANT_64BIT_FLAG (38)  /*!< \c ISB mode monitoring USB */
 #define    RIG_MODE_ISBLSB    CONSTANT_64BIT_FLAG (39)  /*!< \c ISB mode monitoring LSB */
-#define    RIG_MODE_BIT40     CONSTANT_64BIT_FLAG (40)  /*!< \c reserved for future expansion */
-#define    RIG_MODE_BIT41     CONSTANT_64BIT_FLAG (41)  /*!< \c reserved for future expansion */
-#define    RIG_MODE_BIT42     CONSTANT_64BIT_FLAG (42)  /*!< \c reserved for future expansion */
-#define    RIG_MODE_BIT43     CONSTANT_64BIT_FLAG (43)  /*!< \c reserved for future expansion */
-#define    RIG_MODE_BIT44     CONSTANT_64BIT_FLAG (44)  /*!< \c reserved for future expansion */
-#define    RIG_MODE_BIT45     CONSTANT_64BIT_FLAG (45)  /*!< \c reserved for future expansion */
+#define    RIG_MODE_USBD1     CONSTANT_64BIT_FLAG (40)  /*!< \c USB-D1 for some rigs */
+#define    RIG_MODE_USBD2     CONSTANT_64BIT_FLAG (41)  /*!< \c USB-D2 for some rigs */
+#define    RIG_MODE_USBD3     CONSTANT_64BIT_FLAG (42)  /*!< \c USB-D3 for some rigs */
+#define    RIG_MODE_LSBD1     CONSTANT_64BIT_FLAG (43)  /*!< \c LSB-D1 for some rigs */
+#define    RIG_MODE_LSBD2     CONSTANT_64BIT_FLAG (44)  /*!< \c LSB-D1 for some rigs */
+#define    RIG_MODE_LSBD3     CONSTANT_64BIT_FLAG (45)  /*!< \c LSB-D1 for some rigs */
 #define    RIG_MODE_BIT46     CONSTANT_64BIT_FLAG (46)  /*!< \c reserved for future expansion */
 #define    RIG_MODE_BIT47     CONSTANT_64BIT_FLAG (47)  /*!< \c reserved for future expansion */
 #define    RIG_MODE_BIT48     CONSTANT_64BIT_FLAG (48)  /*!< \c reserved for future expansion */
diff --git a/rigs/dummy/flrig.c b/rigs/dummy/flrig.c
index 77524f7fa..aeef6df60 100644
--- a/rigs/dummy/flrig.c
+++ b/rigs/dummy/flrig.c
@@ -143,7 +143,7 @@ struct rig_caps flrig_caps =
     RIG_MODEL(RIG_MODEL_FLRIG),
     .model_name = "",
     .mfg_name = "FLRig",
-    .version = "20231216.0",
+    .version = "20240222.0",
     .copyright = "LGPL",
     .status = RIG_STATUS_STABLE,
     .rig_type = RIG_TYPE_TRANSCEIVER,
@@ -243,6 +243,12 @@ static struct s_modeMap modeMap[] =
     {RIG_MODE_RTTYR, NULL},
     {RIG_MODE_C4FM, NULL},
     {RIG_MODE_DSTAR, NULL},
+    {RIG_MODE_USBD1, NULL},
+    {RIG_MODE_USBD2, NULL},
+    {RIG_MODE_USBD3, NULL},
+    {RIG_MODE_LSBD1, NULL},
+    {RIG_MODE_LSBD2, NULL},
+    {RIG_MODE_LSBD3, NULL},
     {0, NULL}
 };
 
@@ -1012,9 +1018,6 @@ static int flrig_open(RIG *rig)
         H3E
         M11
         USB-D -- doesn't appear to be read/set
-        USB-D1 -- doesn't appear to be read/set
-        USB-D2 -- doesn't appear to be read/set
-        USB-D3 -- doesn't appear to be read/set
         USER-L -- doesn't appear to be read/set
         USER-U -- doesn't appear to be read/set
     */
@@ -1057,9 +1060,9 @@ static int flrig_open(RIG *rig)
         else if (streq(p, "LCW")) { modeMapAdd(&modes, RIG_MODE_CWR, p); }
         else if (streq(p, "LSB")) { modeMapAdd(&modes, RIG_MODE_LSB, p); }
         else if (streq(p, "LSB-D")) { modeMapAdd(&modes, RIG_MODE_PKTLSB, p); }
-        else if (streq(p, "LSB-D1")) { modeMapAdd(&modes, RIG_MODE_PKTLSB, p); }
-        else if (streq(p, "LSB-D2")) { modeMapAdd(&modes, RIG_MODE_PKTLSB, p); }
-        else if (streq(p, "LSB-D3")) { modeMapAdd(&modes, RIG_MODE_PKTLSB, p); }
+        else if (streq(p, "LSB-D1")) { modeMapAdd(&modes, RIG_MODE_LSBD1, p); }
+        else if (streq(p, "LSB-D2")) { modeMapAdd(&modes, RIG_MODE_LSBD2, p); }
+        else if (streq(p, "LSB-D3")) { modeMapAdd(&modes, RIG_MODE_LSBD3, p); }
         else if (streq(p, "NFM")) { modeMapAdd(&modes, RIG_MODE_FMN, p); }
         else if (streq(p, "PKT")) { modeMapAdd(&modes, RIG_MODE_PKTUSB, p); }
         else if (streq(p, "PKT-FM")) { modeMapAdd(&modes, RIG_MODE_PKTFM, p); }
@@ -1082,9 +1085,9 @@ static int flrig_open(RIG *rig)
         else if (streq(p, "SAM")) { modeMapAdd(&modes, RIG_MODE_SAM, p); }
         else if (streq(p, "USB")) { modeMapAdd(&modes, RIG_MODE_USB, p); }
         else if (streq(p, "USB-D")) { modeMapAdd(&modes, RIG_MODE_PKTUSB, p); }
-        else if (streq(p, "USB-D1")) { modeMapAdd(&modes, RIG_MODE_PKTUSB, p); }
-        else if (streq(p, "USB-D2")) { modeMapAdd(&modes, RIG_MODE_PKTUSB, p); }
-        else if (streq(p, "USB-D3")) { modeMapAdd(&modes, RIG_MODE_PKTUSB, p); }
+        else if (streq(p, "USB-D1")) { modeMapAdd(&modes, RIG_MODE_USBD1, p); }
+        else if (streq(p, "USB-D2")) { modeMapAdd(&modes, RIG_MODE_USBD2, p); }
+        else if (streq(p, "USB-D3")) { modeMapAdd(&modes, RIG_MODE_USBD3, p); }
         else if (streq(p, "USER-U")) { modeMapAdd(&modes, RIG_MODE_PKTUSB, p); }
         else if (streq(p, "USER-L")) { modeMapAdd(&modes, RIG_MODE_PKTLSB, p); }
         else if (streq(p, "W-FM")) { modeMapAdd(&modes, RIG_MODE_WFM, p); }
diff --git a/rigs/kenwood/kenwood.c b/rigs/kenwood/kenwood.c
index 0c7df5026..0ad8c5fec 100644
--- a/rigs/kenwood/kenwood.c
+++ b/rigs/kenwood/kenwood.c
@@ -153,7 +153,15 @@ rmode_t kenwood_mode_table[KENWOOD_MODE_TABLE_MAX] =
     [12] = RIG_MODE_PKTLSB,
     [13] = RIG_MODE_PKTUSB,
     [14] = RIG_MODE_PKTFM,
-    [15] = RIG_MODE_PKTAM
+    [14] = RIG_MODE_PKTAM,
+    [16] = RIG_MODE_LSBD2,
+    [17] = RIG_MODE_USBD2,
+    [18] = RIG_MODE_NONE, // FM-D2 not supported yet
+    [19] = RIG_MODE_NONE, // AM-D2 not supported yet
+    [20] = RIG_MODE_LSBD3,
+    [21] = RIG_MODE_USBD3,
+    [22] = RIG_MODE_NONE, // FM-D3 not supported yet
+    [23] = RIG_MODE_NONE, // AM-D3 not supported yet
 };
 
 /*
@@ -2405,6 +2413,12 @@ int kenwood_set_mode(RIG *rig, vfo_t vfo, rmode_t mode, pbwidth_t width)
         if (RIG_MODE_PKTUSB == mode) { mode = RIG_MODE_RTTYR; }
     }
 
+    if (RIG_IS_TS990S)
+    {
+        if (mode == RIG_MODE_PKTUSB) mode = RIG_MODE_USBD1;
+        if (mode == RIG_MODE_PKTLSB) mode = RIG_MODE_LSBD1;
+    }
+
     kmode = rmode2kenwood(mode, caps->mode_table);
 
     if (kmode < 0)
@@ -2455,6 +2469,7 @@ int kenwood_set_mode(RIG *rig, vfo_t vfo, rmode_t mode, pbwidth_t width)
 
             if (err2 != RIG_OK) { RETURNFUNC2(err2); }
         }
+        return RIG_OK;
     }
     else
     {
diff --git a/rigs/kenwood/kenwood.h b/rigs/kenwood/kenwood.h
index 6fa46270c..93565b1f6 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 "20231226"
+#define BACKEND_VER "20240220"
 
 #define EOM_KEN ';'
 #define EOM_TH '\r'
diff --git a/rigs/kenwood/ts990s.c b/rigs/kenwood/ts990s.c
index f2de7a5df..a336a170b 100644
--- a/rigs/kenwood/ts990s.c
+++ b/rigs/kenwood/ts990s.c
@@ -32,7 +32,7 @@
 
 #define TS990S_AM_MODES RIG_MODE_AM
 #define TS990S_FM_MODES (RIG_MODE_FM|RIG_MODE_FMN)
-#define TS990S_OTHER_MODES (RIG_MODE_CW|RIG_MODE_CWR|RIG_MODE_SSB|RIG_MODE_FM|RIG_MODE_RTTY|RIG_MODE_RTTYR|RIG_MODE_PKTUSB|RIG_MODE_PKTLSB)
+#define TS990S_OTHER_MODES (RIG_MODE_CW|RIG_MODE_CWR|RIG_MODE_SSB|RIG_MODE_FM|RIG_MODE_RTTY|RIG_MODE_RTTYR|RIG_MODE_PKTUSB|RIG_MODE_PKTLSB|RIG_MODE_USBD1|RIG_MODE_USBD2|RIG_MODE_USBD3|RIG_MODE_LSBD1|RIG_MODE_LSBD2|RIG_MODE_LSBD3)
 #define TS990S_HP_MODES (TS990S_OTHER_MODES|TS990S_FM_MODES)
 #define TS990S_ALL_MODES (TS990S_OTHER_MODES|TS990S_AM_MODES|TS990S_FM_MODES)
 
@@ -103,16 +103,16 @@ static rmode_t ts990s_mode_table[KENWOOD_MODE_TABLE_MAX] =
     [9] = RIG_MODE_RTTYR,
     [10] = RIG_MODE_NONE,               /* A */
     [11] = RIG_MODE_NONE,               /* B */
-    [12] = RIG_MODE_PKTLSB,         /* C */
-    [13] = RIG_MODE_PKTUSB,         /* D */
+    [12] = RIG_MODE_LSBD1,         /* C */
+    [13] = RIG_MODE_USBD1,         /* D */
     [14] = RIG_MODE_PKTFM,          /* E */
     [15] = RIG_MODE_NONE,               /* F */
-    [16] = RIG_MODE_PKTLSB,         /* G */
-    [17] = RIG_MODE_PKTUSB,         /* H */
+    [16] = RIG_MODE_LSBD2,         /* G */
+    [17] = RIG_MODE_USBD2,         /* H */
     [18] = RIG_MODE_PKTFM,          /* I */
     [19] = RIG_MODE_NONE,               /* J */
-    [20] = RIG_MODE_PKTLSB,         /* K */
-    [21] = RIG_MODE_PKTUSB,         /* L */
+    [20] = RIG_MODE_LSBD3,         /* K */
+    [21] = RIG_MODE_USBD3,         /* L */
     [22] = RIG_MODE_PKTFM,          /* M */
     [23] = RIG_MODE_NONE,               /* N */
 };