diff --git a/Misc/NEWS b/Misc/NEWS
index 11be2e2b45f..a4c464fe5b7 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -60,6 +60,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #13194: zlib.compressobj().copy() and zlib.decompressobj().copy() are
+  now available on Windows.
+
 - Issue #13114: Fix the distutils commands check and register when the
   long description is a Unicode string with non-ASCII characters.
 
diff --git a/PC/pyconfig.h b/PC/pyconfig.h
index c9cd2c08aa4..1cfc59b8ce7 100644
--- a/PC/pyconfig.h
+++ b/PC/pyconfig.h
@@ -643,6 +643,9 @@ Py_NO_ENABLE_SHARED to find out.  Also support MS_NO_COREDLL for b/w compat */
 #define HAVE_WCSCOLL 1
 #endif
 
+/* Define if the zlib library has inflateCopy */
+#define HAVE_ZLIB_COPY 1
+
 /* Define if you have the <dlfcn.h> header file.  */
 /* #undef HAVE_DLFCN_H */