diff --git a/src/gfx/reverse.cpp b/src/gfx/reverse.cpp
index d7ae966b..e0fcec9d 100644
--- a/src/gfx/reverse.cpp
+++ b/src/gfx/reverse.cpp
@@ -135,7 +135,7 @@ void reverse() {
 	options.verbosePrint(Options::VERB_INTERM, "Reversed image dimensions: %zux%zu tiles\n", width,
 	                     height);
 
-	// TODO: -U
+	// TODO: `-U` to configure tile size beyond 8x8px ("deduplication units")
 
 	std::vector<std::array<Rgba, 4>> palettes{
 	    {Rgba(0xFFFFFFFF), Rgba(0xAAAAAAFF), Rgba(0x555555FF), Rgba(0x000000FF)}