diff --git a/openrtx/include/ui.h b/openrtx/include/ui.h
index f74a8912..5b1a973a 100644
--- a/openrtx/include/ui.h
+++ b/openrtx/include/ui.h
@@ -123,7 +123,7 @@ extern layout_t layout;
 extern settings_t settings;
 extern const char *menu_items[6];
 extern const char *settings_items[2];
-extern const char *display_items[2];
+extern const char *display_items[];
 extern const uint8_t menu_num;
 extern const uint8_t settings_num;
 extern const uint8_t display_num;
diff --git a/openrtx/src/ui/ui.c b/openrtx/src/ui/ui.c
index c4ce14aa..9536d5a7 100644
--- a/openrtx/src/ui/ui.c
+++ b/openrtx/src/ui/ui.c
@@ -117,11 +117,18 @@ const char *settings_items[2] =
     "Display"
 };
 
+#ifdef SCREEN_CONTRAST
 const char *display_items[2] =
 {
     "Brightness",
     "Contrast"
 };
+#else
+const char *display_items[1] =
+{
+    "Brightness",
+};
+#endif
 
 // Calculate number of main menu entries
 const uint8_t menu_num = sizeof(menu_items)/sizeof(menu_items[0]);
@@ -946,11 +953,11 @@ void ui_updateFSM(event_t event, bool *sync_rtx)
                     if(ui_state.menu_selected > 0)
                         ui_state.menu_selected -= 1;
                     else
-                        ui_state.menu_selected = settings_num-1;
+                        ui_state.menu_selected = display_num-1;
                 }
                 else if(msg.keys & KEY_DOWN)
                 {
-                    if(ui_state.menu_selected < settings_num-1)
+                    if(ui_state.menu_selected < display_num-1)
                         ui_state.menu_selected += 1;
                     else
                         ui_state.menu_selected = 0;
diff --git a/platform/targets/GD77/hwconfig.h b/platform/targets/GD77/hwconfig.h
index 22bc5e1b..86b54446 100644
--- a/platform/targets/GD77/hwconfig.h
+++ b/platform/targets/GD77/hwconfig.h
@@ -40,6 +40,9 @@
 /* Screen pixel format */
 #define PIX_FMT_BW
 
+/* Screen has adjustable contrast */
+#define SCREEN_CONTRAST
+
 /* Battery type */
 #define BAT_LIPO_2S
 
diff --git a/platform/targets/linux/hwconfig.h b/platform/targets/linux/hwconfig.h
index ffd5e5bd..94f6e03d 100644
--- a/platform/targets/linux/hwconfig.h
+++ b/platform/targets/linux/hwconfig.h
@@ -21,6 +21,9 @@
 /* Device has a working real time clock */
 #define HAS_RTC
 
+/* Screen has adjustable contrast */
+#define SCREEN_CONTRAST
+
 /* Supported radio bands */
 #define BAND_VHF
 #define BAND_UHF