diff --git a/src/pixmap.cxx b/src/pixmap.cxx
index d23181c..58a766a 100644
--- a/src/pixmap.cxx
+++ b/src/pixmap.cxx
@@ -254,8 +254,9 @@ CPixmap::Cache (
       return false;
     }
 
-    SDL_SetTextureBlendMode (
-      m_SDLTextureInfo[channel].texture, SDL_BLENDMODE_BLEND);
+    if (channel != CHBACK)
+      SDL_SetTextureBlendMode (
+        m_SDLTextureInfo[channel].texture, SDL_BLENDMODE_BLEND);
   }
 
   SDL_SetRenderTarget (g_renderer, m_SDLTextureInfo[channel].texture);