diff --git a/src/gfx/reverse.cpp b/src/gfx/reverse.cpp
index 2054e6e1..30eb97c6 100644
--- a/src/gfx/reverse.cpp
+++ b/src/gfx/reverse.cpp
@@ -531,7 +531,7 @@ void reverse() {
 				// If vertically mirrored, fetch the bytes from the other end
 				uint8_t realY = (attribute & 0x40 ? 7 - y : y) * options.bitDepth;
 				uint8_t bitplane0 = tileData[realY];
-				uint8_t bitplane1 = tileData[realY + 1 % options.bitDepth];
+				uint8_t bitplane1 = options.bitDepth == 2 ? tileData[realY + 1] : bitplane0;
 				if (attribute & 0x20) { // Handle horizontal flip
 					bitplane0 = flipTable[bitplane0];
 					bitplane1 = flipTable[bitplane1];