diff --git a/src/app/thumbnails.cpp b/src/app/thumbnails.cpp
index be15c1737..c1ed2cce8 100644
--- a/src/app/thumbnails.cpp
+++ b/src/app/thumbnails.cpp
@@ -54,23 +54,12 @@ she::Surface* get_cel_thumbnail(const doc::Cel* cel,
   base::UniquePtr<doc::Image> thumb_img(doc::Image::create(
                                           image->pixelFormat(), thumb_size.w, thumb_size.h));
 
-  double alpha = 255.0;
-  uint8_t bg_r[] = { rgba_getr(bg1), rgba_getr(bg2) };
-  uint8_t bg_g[] = { rgba_getg(bg1), rgba_getg(bg2) };
-  uint8_t bg_b[] = { rgba_getb(bg1), rgba_getb(bg2) };
-  uint8_t bg_a[] = { rgba_geta(bg1), rgba_geta(bg2) };
-
-  doc::color_t bg[] = {
-    rgba(bg_r[0], bg_g[0], bg_b[0], (int)(bg_a[0] * alpha)),
-    rgba(bg_r[1], bg_g[1], bg_b[1], (int)(bg_a[1] * alpha))
-  };
-
   int block_size = MID(4, thumb_size.w/8, 16);
   for (int dst_y = 0; dst_y < thumb_size.h; dst_y++) {
     for (int dst_x = 0; dst_x < thumb_size.w; dst_x++) {
       thumb_img->putPixel(dst_x, dst_y,
-                          bg[((dst_x / block_size) % 2) ^
-                             ((dst_y / block_size) % 2)]);
+                          (((dst_x / block_size) % 2) ^
+                           ((dst_y / block_size) % 2)) ? bg2: bg1);
     }
   }