diff --git a/rigs/dummy/trxmanager.c b/rigs/dummy/trxmanager.c
index a5cbf2f46..f0184558d 100644
--- a/rigs/dummy/trxmanager.c
+++ b/rigs/dummy/trxmanager.c
@@ -1157,7 +1157,7 @@ static int trxmanager_set_split_freq_mode(RIG *rig, vfo_t vfo, freq_t freq,
 
     rig_debug(RIG_DEBUG_TRACE, "%s\n", __func__);
 
-    if (vfo != RIG_VFO_CURR && vfo != RIG_VFO_TX)
+    if (vfo != RIG_VFO_CURR && vfo != RIG_VFO_TX && vfo != RIG_VFO_B)
     {
         return -RIG_ENTARGET;
     }
diff --git a/rigs/dummy/trxmanager.h b/rigs/dummy/trxmanager.h
index 1a85b606b..436fa5384 100644
--- a/rigs/dummy/trxmanager.h
+++ b/rigs/dummy/trxmanager.h
@@ -30,7 +30,7 @@
 #include <sys/time.h>
 #endif
 
-#define BACKEND_VER "20200329"
+#define BACKEND_VER "20210613"
 
 #define EOM "\r"
 #define TRUE 1