diff --git a/NEWS b/NEWS
index 77676d0f432..24ffd4cd4d6 100644
--- a/NEWS
+++ b/NEWS
@@ -82,6 +82,8 @@ PHP                                                                        NEWS
 
 - Fixed memory leaks in openssl streams context options. (Pierre)
 - Fixed handling of extremely long paths inside tempnam() function. (Ilia)
+- Fixed bug #38072 (boolean arg for mysqli_autocommit() is always true on 
+  Solaris). (Tony)
 - Fixed bug #38067 (Parameters are not decoded from utf-8 when using encoding
   option). (Dmitry)
 - Fixed bug #38055 (Wrong interpretation of boolean parameters). (Dmitry)
diff --git a/ext/mysqli/mysqli_api.c b/ext/mysqli/mysqli_api.c
index 51d219a3236..d8b0b683a26 100644
--- a/ext/mysqli/mysqli_api.c
+++ b/ext/mysqli/mysqli_api.c
@@ -57,14 +57,14 @@ PHP_FUNCTION(mysqli_autocommit)
 {
 	MY_MYSQL 		*mysql;
 	zval  			*mysql_link;
-	unsigned long	automode;
+	zend_bool		automode;
 
 	if (zend_parse_method_parameters(ZEND_NUM_ARGS() TSRMLS_CC, getThis(), "Ob", &mysql_link, mysqli_link_class_entry, &automode) == FAILURE) {
 		return;	
 	}
 	MYSQLI_FETCH_RESOURCE(mysql, MY_MYSQL *, &mysql_link, "mysqli_link", MYSQLI_STATUS_VALID);
 
-	if (mysql_autocommit(mysql->mysql, automode)) {
+	if (mysql_autocommit(mysql->mysql, (my_bool)automode)) {
 		RETURN_FALSE;
 	}
 	RETURN_TRUE;
diff --git a/ext/mysqli/tests/068.phpt b/ext/mysqli/tests/068.phpt
new file mode 100644
index 00000000000..ab407c1ad8e
--- /dev/null
+++ b/ext/mysqli/tests/068.phpt
@@ -0,0 +1,33 @@
+--TEST--
+mysqli_autocommit() tests
+--SKIPIF--
+<?php 
+	require_once('skipif.inc'); 
+?>
+--FILE--
+<?php
+
+include "connect.inc";
+
+$mysqli = new mysqli($host, $user, $passwd, "test");
+
+var_dump($mysqli->autocommit(false));
+$result = $mysqli->query("SELECT @@autocommit");
+var_dump($result->fetch_row());
+
+var_dump($mysqli->autocommit(true));
+$result = $mysqli->query("SELECT @@autocommit");
+var_dump($result->fetch_row());
+
+?>
+--EXPECT--
+bool(true)
+array(1) {
+  [0]=>
+  string(1) "0"
+}
+bool(true)
+array(1) {
+  [0]=>
+  string(1) "1"
+}