From b26d3dc7b614eca672cd7f2b475780f844b89c2e Mon Sep 17 00:00:00 2001
From: Gaspar Capello <gaspar@igarastudio.com>
Date: Thu, 20 May 2021 08:53:11 -0300
Subject: [PATCH] Minor fix in primitives.cpp

---
 src/doc/primitives.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/doc/primitives.cpp b/src/doc/primitives.cpp
index 3a08d814b..ef1e1ea96 100644
--- a/src/doc/primitives.cpp
+++ b/src/doc/primitives.cpp
@@ -497,7 +497,7 @@ void preprocess_transparent_pixels(Image* image)
     }
 
     case IMAGE_GRAYSCALE: {
-      LockImageBits<RgbTraits> bits(image);
+      LockImageBits<GrayscaleTraits> bits(image);
       auto it = bits.begin(), end = bits.end();
       for (; it != end; ++it) {
         if (graya_geta(*it) == 0)