diff --git a/iopcomm/iopcomm.cpp b/iopcomm/iopcomm.cpp
index 4c8830c..e48c6dd 100644
--- a/iopcomm/iopcomm.cpp
+++ b/iopcomm/iopcomm.cpp
@@ -53,7 +53,7 @@ void sendIOPModeCommand(rig_mode mode)
 	IOPMessage m;
 	m.id = IOP_MODE_COMMAND;
 	m.len = 1;
-	m.data[0] = uint8_t(mode);
+	m.data[0] = static_cast<uint8_t>(mode);
 	sendIOPMessage(m);
 }
 
diff --git a/ubitx_iop/ubitx_iop.ino b/ubitx_iop/ubitx_iop.ino
index f4e29f3..df9fe85 100644
--- a/ubitx_iop/ubitx_iop.ino
+++ b/ubitx_iop/ubitx_iop.ino
@@ -188,14 +188,14 @@ void loop()
     
   } else if (knobPos > 3 && menu_is_active) {
     // left
-    menu_item->prev();
+    menu_item = menu_item->prev();
     knob.write(0);
     menu_updated = true;
     USBDEBUG("knob turned left");    
     
   } else if (knobPos < -3 && menu_is_active) {
     // right
-    menu_item->next();
+    menu_item = menu_item->next();
     knob.write(0);
     menu_updated = true;
     USBDEBUG("knob turned right");