diff --git a/firmware/common/ui.hpp b/firmware/common/ui.hpp
index 8ac914ae6..0a44efb6d 100644
--- a/firmware/common/ui.hpp
+++ b/firmware/common/ui.hpp
@@ -257,6 +257,11 @@ struct Rect {
 	}
 };
 
+struct Bitmap {
+	const Size size;
+	const uint8_t* const data;
+};
+
 enum class KeyEvent {
 	/* Ordinals map to bit positions reported by CPLD */
 	Right = 0,