diff --git a/src/Backends/Rendering/SDLTexture.cpp b/src/Backends/Rendering/SDLTexture.cpp
index 9b62b6dd..b4de29a1 100644
--- a/src/Backends/Rendering/SDLTexture.cpp
+++ b/src/Backends/Rendering/SDLTexture.cpp
@@ -240,12 +240,11 @@ void RenderBackend_UploadSurface(RenderBackend_Surface *surface, const unsigned
 	}
 
 	const unsigned char *src_pixel = pixels;
+	unsigned char *buffer_pointer = buffer;
 
 	// Convert the colour-keyed pixels to RGBA32
 	for (size_t y = 0; y < height; ++y)
 	{
-		unsigned char *buffer_pointer = &buffer[y * width * 4];
-
 		for (size_t x = 0; x < width; ++x)
 		{
 			*buffer_pointer++ = src_pixel[0];