diff --git a/scorched3d-libpng15.patch b/scorched3d-libpng15.patch
index 70e56f3..c743370 100644
--- a/scorched3d-libpng15.patch
+++ b/scorched3d-libpng15.patch
@@ -46,7 +46,7 @@
  	}
  	surface = SDL_AllocSurface(SDL_SWSURFACE, width, height,
 -			bit_depth*info_ptr->channels, Rmask,Gmask,Bmask,Amask);
-+			png_get_channels(png_ptr, info_ptr), Rmask,Gmask,Bmask,Amask);
++			bit_depth*png_get_channels(png_ptr, info_ptr), Rmask,Gmask,Bmask,Amask);
  	if ( surface == NULL ) {
  		error = "Out of memory";
  		goto done;