diff --git a/display.h b/display.h
--- a/display.h
+++ b/display.h
@@ -15,6 +15,7 @@
 #include "max31865.h"
 #endif
 
+void display_startup_screen();
 void display_process(therm_settings_t* set, therm_status_t* status);
 
 #endif