diff --git a/Misc/ACKS b/Misc/ACKS
index 6f7d9d1..7096d72 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -874,6 +874,7 @@
 Amy Taylor
 Anatoly Techtonik
 Mikhail Terekhov
+Richard M. Tew
 Tobias Thelen
 James Thomas
 Robin Thomas
diff --git a/Misc/NEWS b/Misc/NEWS
index f6fe5b7..23b336b 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -22,6 +22,9 @@
 Library
 -------
 
+- Issue #12839: Fix crash in zlib module due to version mismatch.
+  Fix by Richard M. Tew.
+
 - Issue #11657: Fix sending file descriptors over 255 over a multiprocessing
   Pipe.