diff --git a/Source/Resource/Sprites/SpriteEncoding.cpp b/Source/Resource/Sprites/SpriteEncoding.cpp
index f3107f1e..fdf5d9ec 100644
--- a/Source/Resource/Sprites/SpriteEncoding.cpp
+++ b/Source/Resource/Sprites/SpriteEncoding.cpp
@@ -56,12 +56,14 @@ std::uint8_t* CSprRes::ReduceSprite(const std::uint8_t* pixels, int width, int h
   const int outputWidth = halfWidth != 0 ? width / 2 : width;
   const int outputHeight = halfHeight != 0 ? height / 2 : height;
   auto* output = new std::uint8_t[outputWidth * outputHeight];
+  std::uint8_t* destination = output;
 
   for (int y = 0; y < outputHeight; ++y) {
     const auto* source = pixels + width * y * (halfHeight + 1);
 
     for (int x = 0; x < outputWidth; ++x) {
-      output[y * outputWidth + x] = source[x * (halfWidth + 1)];
+      *destination++ = *source;
+      source += halfWidth + 1;
     }
   }