From a315af3c73d107d73da90f54f41a0b88f27a3d80 Mon Sep 17 00:00:00 2001
From: Cristy <urban-warrior@imagemagick.org>
Date: Sat, 15 Sep 2018 13:36:46 -0400
Subject: [PATCH] https://github.com/ImageMagick/ImageMagick/issues/1305

---
 coders/png.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/coders/png.c b/coders/png.c
index 01af8de27..ed08314d5 100644
--- a/coders/png.c
+++ b/coders/png.c
@@ -9030,6 +9030,7 @@ static MagickBooleanType WriteOnePNGImage(MngInfo *mng_info,
      number_semitransparent = 0;
      number_transparent = 0;
 
+     (void) SetImageDepth(image,image->depth,exception);
      for (y=0; y < (ssize_t) image->rows; y++)
      {
        r=GetVirtualPixels(image,0,y,image->columns,1,exception);
-- 
2.40.0