diff --git a/src/app/ScreenManager.h b/src/app/ScreenManager.h
index 061a792..1cafb45 100644
--- a/src/app/ScreenManager.h
+++ b/src/app/ScreenManager.h
@@ -26,8 +26,8 @@ class ScreenManager
     boolean addView(boolean (*viewLogicFunction)(Adafruit_SSD1306&, void*), void *pData, const unsigned char UID);
     boolean removeView(const unsigned char UID);
     boolean displayView(const uint8_t UID);
-    void displayNextView();
-    void displayPreviousView();
+    boolean displayNextView();
+    boolean displayPreviousView();
     void forceRefresh();
     boolean applyCfgFromSD();
     void invertDisplayColor(const boolean inverted);