diff --git a/rigs/kenwood/ic10.c b/rigs/kenwood/ic10.c
index e133635ca..14801f59e 100644
--- a/rigs/kenwood/ic10.c
+++ b/rigs/kenwood/ic10.c
@@ -408,9 +408,11 @@ int ic10_set_freq(RIG *rig, vfo_t vfo, freq_t freq)
 
     switch (tvfo)
     {
-    case RIG_VFO_A: vfo_letter = 'A'; break;
+    case RIG_VFO_A:
+    case RIG_VFO_MAIN: vfo_letter = 'A'; break;
 
-    case RIG_VFO_B: vfo_letter = 'B'; break;
+    case RIG_VFO_B: 
+    case RIG_VFO_SUB: vfo_letter = 'B'; break;
 
     default:
         rig_debug(RIG_DEBUG_ERR, "%s: unsupported VFO %s\n",