From dda4ab6f65d9ae37d245d6b9789fbc3d8718ad0e Mon Sep 17 00:00:00 2001
From: Rogdham <contact@rogdham.net>
Date: Fri, 29 May 2026 19:41:36 +0200
Subject: [PATCH 1/2] Fix zstd compression with digested ZstdDict

---
 Modules/_zstd/compressor.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Modules/_zstd/compressor.c b/Modules/_zstd/compressor.c
index b2eb22d9ec8add8..894568fce28d0d5 100644
--- a/Modules/_zstd/compressor.c
+++ b/Modules/_zstd/compressor.c
@@ -347,6 +347,7 @@ _zstd_ZstdCompressor_new_impl(PyTypeObject *type, PyObject *level,
     }
 
     self->use_multithread = 0;
+    self->compression_level = ZSTD_CLEVEL_DEFAULT;
     self->dict = NULL;
     self->lock = (PyMutex){0};
 

From e678e02860a94ae1a5d6927ed8c5fe9c4d54d026 Mon Sep 17 00:00:00 2001
From: Rogdham <contact@rogdham.net>
Date: Wed, 3 Jun 2026 19:36:02 +0200
Subject: [PATCH 2/2] Add NEWS entry

---
 .../next/Library/2026-06-03-19-35-32.gh-issue-150583.dedI24.rst | 2 ++
 1 file changed, 2 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Library/2026-06-03-19-35-32.gh-issue-150583.dedI24.rst

diff --git a/Misc/NEWS.d/next/Library/2026-06-03-19-35-32.gh-issue-150583.dedI24.rst b/Misc/NEWS.d/next/Library/2026-06-03-19-35-32.gh-issue-150583.dedI24.rst
new file mode 100644
index 000000000000000..7579a0a0b9421e3
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2026-06-03-19-35-32.gh-issue-150583.dedI24.rst
@@ -0,0 +1,2 @@
+Fix compression level in :mod:`compression.zstd` when passing a digested
+dictionary during compression.