diff --git a/Utilities.h b/Utilities.h
index 4720d1e..efd1855 100644
--- a/Utilities.h
+++ b/Utilities.h
@@ -51,6 +51,7 @@ uint8_t eeprom_read(uint32_t mapped_addr);
   #include "Display.h"
 #else
 	void display_unblank() {}
+	bool display_blanked = false;
 #endif
 
 #if HAS_BLUETOOTH == true || HAS_BLE == true