diff --git a/src/uimenu.cpp b/src/uimenu.cpp
index f54fa76..1b18d26 100644
--- a/src/uimenu.cpp
+++ b/src/uimenu.cpp
@@ -31,13 +31,13 @@
 
 using namespace std;
 
-CUIMenu::TMenuItem CUIMenu::s_MenuRoot[] =
+const CUIMenu::TMenuItem CUIMenu::s_MenuRoot[] =
 {
 	{"MiniDexed", MenuHandler, s_MainMenu},
 	{0}
 };
 
-CUIMenu::TMenuItem CUIMenu::s_MainMenu[] =
+const CUIMenu::TMenuItem CUIMenu::s_MainMenu[] =
 {
 	{"TG1",		MenuHandler,	s_TGMenu, 0},
 #ifdef ARM_ALLOW_MULTI_CORE
@@ -52,7 +52,7 @@ CUIMenu::TMenuItem CUIMenu::s_MainMenu[] =
 	{0}
 };
 
-CUIMenu::TMenuItem CUIMenu::s_TGMenu[] =
+const CUIMenu::TMenuItem CUIMenu::s_TGMenu[] =
 {
 	{"Voice",	EditProgramNumber},
 	{"Bank",	EditVoiceBankNumber},
@@ -66,7 +66,7 @@ CUIMenu::TMenuItem CUIMenu::s_TGMenu[] =
 };
 
 // must match CMiniDexed::TTGParameter
-CUIMenu::TParameter CUIMenu::s_TGParameter[CMiniDexed::TGParameterUnknown] =
+const CUIMenu::TParameter CUIMenu::s_TGParameter[CMiniDexed::TGParameterUnknown] =
 {
 	{0,	CSysExFileLoader::MaxVoiceBankID,	1},		// TGParameterVoiceBank
 	{0,	CSysExFileLoader::VoicesPerBank-1,	1},		// TGParameterProgram
diff --git a/src/uimenu.h b/src/uimenu.h
index d113f20..9815b8d 100644
--- a/src/uimenu.h
+++ b/src/uimenu.h
@@ -57,7 +57,7 @@ private:
 	{
 		const char *Name;
 		TMenuHandler *Handler;
-		TMenuItem *MenuItem;
+		const TMenuItem *MenuItem;
 		unsigned Parameter;
 	};
 
@@ -87,24 +87,24 @@ private:
 	CUserInterface *m_pUI;
 	CMiniDexed *m_pMiniDexed;
 
-	TMenuItem *m_pParentMenu;
-	TMenuItem *m_pCurrentMenu;
+	const TMenuItem *m_pParentMenu;
+	const TMenuItem *m_pCurrentMenu;
 	unsigned m_nCurrentMenuItem;
 	unsigned m_nCurrentSelection;
 	unsigned m_nCurrentParameter;
 
-	TMenuItem *m_MenuStackParent[MaxMenuDepth];
-	TMenuItem *m_MenuStackMenu[MaxMenuDepth];
+	const TMenuItem *m_MenuStackParent[MaxMenuDepth];
+	const TMenuItem *m_MenuStackMenu[MaxMenuDepth];
 	unsigned m_nMenuStackItem[MaxMenuDepth];
 	unsigned m_nMenuStackSelection[MaxMenuDepth];
 	unsigned m_nMenuStackParameter[MaxMenuDepth];
 	unsigned m_nCurrentMenuDepth;
 
-	static TMenuItem s_MenuRoot[];
-	static TMenuItem s_MainMenu[];
-	static TMenuItem s_TGMenu[];
+	static const TMenuItem s_MenuRoot[];
+	static const TMenuItem s_MainMenu[];
+	static const TMenuItem s_TGMenu[];
 
-	static TParameter s_TGParameter[];
+	static const TParameter s_TGParameter[];
 };
 
 #endif