diff --git a/NEWS b/NEWS
index c26dfd03a19..a28ed64e8c4 100644
--- a/NEWS
+++ b/NEWS
@@ -3,10 +3,13 @@ PHP                                                                        NEWS
 ?? ??? 2022, PHP 8.0.19
 
 - Core:
-  
   . Fixed bug GH-8289 (Exceptions thrown within a yielded from iterator are
     not rethrown into the generator). (Bob)
 
+- MySQLi:
+  . Fixed bug GH-8267 (MySQLi uses unsupported format specifier on Windows).
+    (cmb)
+
 14 Apr 2022, PHP 8.0.18
 
 - Core:
diff --git a/ext/mysqli/php_mysqli_structs.h b/ext/mysqli/php_mysqli_structs.h
index 16ed9ddefce..eb74a35697a 100644
--- a/ext/mysqli/php_mysqli_structs.h
+++ b/ext/mysqli/php_mysqli_structs.h
@@ -134,8 +134,6 @@ typedef struct {
 
 #ifdef PHP_WIN32
 #define PHP_MYSQLI_API __declspec(dllexport)
-#define MYSQLI_LLU_SPEC "%I64u"
-#define MYSQLI_LL_SPEC "%I64d"
 #ifndef L64
 #define L64(x) x##i64
 #endif
@@ -146,16 +144,17 @@ typedef __int64 my_longlong;
 # else
 #  define PHP_MYSQLI_API
 # endif
-/* we need this for PRIu64 and PRId64 */
-#include <inttypes.h>
-#define MYSQLI_LLU_SPEC "%" PRIu64
-#define MYSQLI_LL_SPEC "%" PRId64
 #ifndef L64
 #define L64(x) x##LL
 #endif
 typedef int64_t my_longlong;
 #endif
 
+/* we need this for PRIu64 and PRId64 */
+#include <inttypes.h>
+#define MYSQLI_LLU_SPEC "%" PRIu64
+#define MYSQLI_LL_SPEC "%" PRId64
+
 #ifdef ZTS
 #include "TSRM.h"
 #endif
diff --git a/ext/mysqli/tests/gh8267.phpt b/ext/mysqli/tests/gh8267.phpt
new file mode 100644
index 00000000000..204bfbb79ca
--- /dev/null
+++ b/ext/mysqli/tests/gh8267.phpt
@@ -0,0 +1,22 @@
+--TEST--
+Bug GH-8267 (MySQLi uses unsupported format specifier on Windows)
+--SKIPIF--
+<?php
+require_once("skipif.inc");
+require_once("skipifconnectfailure.inc");
+?>
+--FILE--
+<?php
+require_once("connect.inc");
+
+$mysqli = my_mysqli_connect($host, $user, $passwd, $db, $port, $socket);
+$mysqli->query("DROP TABLE IF EXISTS foo");
+$mysqli->query("CREATE TABLE foo (id BIGINT UNSIGNED AUTO_INCREMENT, PRIMARY KEY (id))");
+$mysqli->query("INSERT INTO foo VALUES (9223372036854775807)");
+var_dump($mysqli->insert_id);
+$mysqli->query("INSERT INTO foo VALUES (0)");
+var_dump($mysqli->insert_id);
+?>
+--EXPECT--
+string(19) "9223372036854775807"
+string(19) "9223372036854775808"