diff --git a/.github/actions/spelling/expect/expect.txt b/.github/actions/spelling/expect/expect.txt
index 1a896e0ced..e78cb97139 100644
--- a/.github/actions/spelling/expect/expect.txt
+++ b/.github/actions/spelling/expect/expect.txt
@@ -215,6 +215,7 @@ codepages
 codepath
 coinit
 colorizing
+COLORONCOLOR
 COLORREFs
 colorschemes
 colorspec
diff --git a/src/renderer/gdi/state.cpp b/src/renderer/gdi/state.cpp
index 7563a68b7d..d8f98ef50f 100644
--- a/src/renderer/gdi/state.cpp
+++ b/src/renderer/gdi/state.cpp
@@ -128,6 +128,9 @@ GdiEngine::~GdiEngine()
     // We need the advanced graphics mode in order to set a transform.
     SetGraphicsMode(hdcNewMemoryContext, GM_ADVANCED);
 
+    // We set the bitmap stretching mode to improve the Sixel image quality.
+    SetStretchBltMode(hdcNewMemoryContext, COLORONCOLOR);
+
     // If we had an existing memory context stored, release it before proceeding.
     if (nullptr != _hdcMemoryContext)
     {