diff --git a/ui/menu.c b/ui/menu.c
index df5a0ec..32f6731 100644
--- a/ui/menu.c
+++ b/ui/menu.c
@@ -194,7 +194,7 @@ const char gSubMenu_TOT[][7] =
 	"15 min"
 };
 
-const char* gSubMenu_RXMode[] =
+const char* const gSubMenu_RXMode[] =
 {
 	"MAIN\nONLY", 		// TX and RX on main only
 	"DUAL RX\nRESPOND", // Watch both and respond
@@ -218,7 +218,7 @@ const char gSubMenu_SC_REV[][8] =
 	"STOP"
 };
 
-const char* gSubMenu_MDF[] =
+const char* const gSubMenu_MDF[] =
 {
 	"FREQ",
 	"CHANNEL\nNUMBER",
@@ -244,7 +244,7 @@ const char gSubMenu_D_RSP[][11] =
 };
 #endif
 
-const char* gSubMenu_PTT_ID[] =
+const char* const gSubMenu_PTT_ID[] =
 {
 	"OFF",
 	"UP CODE",
@@ -274,7 +274,7 @@ const char gSubMenu_RESET[][4] =
 	"ALL"
 };
 
-const char * gSubMenu_F_LOCK[] =
+const char * const gSubMenu_F_LOCK[] =
 {
 	"DEFAULT+\n137-174\n400-470",
 	"FCC HAM\n144-148\n420-450",
diff --git a/ui/menu.h b/ui/menu.h
index ba43619..16f5c1c 100644
--- a/ui/menu.h
+++ b/ui/menu.h
@@ -135,24 +135,24 @@ extern const char        gSubMenu_W_N[2][7];
 extern const char        gSubMenu_OFF_ON[2][4];
 extern const char        gSubMenu_SAVE[5][4];
 extern const char        gSubMenu_TOT[11][7];
-extern const char*        gSubMenu_RXMode[4];
+extern const char* const gSubMenu_RXMode[4];
 
 #ifdef ENABLE_VOICE
 	extern const char    gSubMenu_VOICE[3][4];
 #endif
 extern const char        gSubMenu_SC_REV[3][8];
-extern const char*       gSubMenu_MDF[4];
+extern const char* const gSubMenu_MDF[4];
 #ifdef ENABLE_ALARM
 	extern const char    gSubMenu_AL_MOD[2][5];
 #endif
 #ifdef ENABLE_DTMF_CALLING
 extern const char        gSubMenu_D_RSP[4][11];
 #endif
-extern const char*       gSubMenu_PTT_ID[5];
+extern const char* const gSubMenu_PTT_ID[5];
 extern const char        gSubMenu_PONMSG[4][8];
 extern const char        gSubMenu_ROGER[3][6];
 extern const char        gSubMenu_RESET[2][4];
-extern const char*       gSubMenu_F_LOCK[F_LOCK_LEN];
+extern const char* const gSubMenu_F_LOCK[F_LOCK_LEN];
 extern const char        gSubMenu_BACKLIGHT[8][7];
 extern const char        gSubMenu_RX_TX[4][6];
 extern const char        gSubMenu_BAT_TXT[3][8];