diff --git a/ext/pdo/pdo_dbh.c b/ext/pdo/pdo_dbh.c
index c988a575fbf..20a72a1f592 100644
--- a/ext/pdo/pdo_dbh.c
+++ b/ext/pdo/pdo_dbh.c
@@ -1499,15 +1499,15 @@ static void dbh_free(pdo_dbh_t *dbh, zend_bool free_persistent)
 {
 	int i;
 
-	if (dbh->is_persistent && !free_persistent) {
-		return;
-	}
-
 	if (dbh->query_stmt) {
 		zval_ptr_dtor(&dbh->query_stmt_zval);
 		dbh->query_stmt = NULL;
 	}
 
+	if (dbh->is_persistent && !free_persistent) {
+		return;
+	}
+
 	if (dbh->methods) {
 		dbh->methods->closer(dbh);
 	}
diff --git a/ext/pdo/tests/bug_72788.phpt b/ext/pdo/tests/bug_72788.phpt
new file mode 100644
index 00000000000..80609a21ba2
--- /dev/null
+++ b/ext/pdo/tests/bug_72788.phpt
@@ -0,0 +1,33 @@
+--TEST--
+PDO Common: Bug #72788 (Invalid memory access when using persistent PDO connection)
+--SKIPIF--
+<?php
+if (!extension_loaded('pdo')) die('skip');
+$dir = getenv('REDIR_TEST_DIR');
+if (false == $dir) die('skip no driver');
+require_once $dir . 'pdo_test.inc';
+PDOTest::skip();
+?>
+--FILE--
+<?php
+if (getenv('REDIR_TEST_DIR') === false) putenv('REDIR_TEST_DIR='.dirname(__FILE__) . '/../../pdo/tests/');
+require_once getenv('REDIR_TEST_DIR') . 'pdo_test.inc';
+
+putenv("PDOTEST_ATTR=" . serialize(array(PDO::ATTR_PERSISTENT => true)));
+
+function test() {
+    $db = PDOTest::factory('PDO', false);
+    $stmt = @$db->query("SELECT 1 FROM TABLE_DOES_NOT_EXIST");
+    if ($stmt === false) {
+        echo "Statement failed as expected\n";
+    }
+}
+
+test();
+test();
+echo "Done";
+?>
+--EXPECT--
+Statement failed as expected
+Statement failed as expected
+Done
diff --git a/ext/pdo/tests/pdo_017.phpt b/ext/pdo/tests/pdo_017.phpt
index 31ee88b76b4..2b8568fb46c 100644
--- a/ext/pdo/tests/pdo_017.phpt
+++ b/ext/pdo/tests/pdo_017.phpt
@@ -16,7 +16,7 @@ try {
 }
 
 if ($db->getAttribute(PDO::ATTR_DRIVER_NAME) == 'mysql') {
-	require_once(dirname(__FILE__) . DIRECTORY_SEPARATOR . 'mysql_pdo_test.inc');
+	require_once(dirname(__FILE__) . DIRECTORY_SEPARATOR . '../../pdo_mysql/tests/mysql_pdo_test.inc');
 	if (false === MySQLPDOTest::detect_transactional_mysql_engine($db)) {
 		die('skip your mysql configuration does not support working transactions');
 	}
@@ -29,7 +29,7 @@ require_once getenv('REDIR_TEST_DIR') . 'pdo_test.inc';
 $db = PDOTest::factory();
 
 if ($db->getAttribute(PDO::ATTR_DRIVER_NAME) == 'mysql') {
-	require_once(dirname(__FILE__) . DIRECTORY_SEPARATOR . 'mysql_pdo_test.inc');
+	require_once(dirname(__FILE__) . DIRECTORY_SEPARATOR . '../../pdo_mysql/tests/mysql_pdo_test.inc');
 	$suf = ' ENGINE=' . MySQLPDOTest::detect_transactional_mysql_engine($db);
 } else {
 	$suf = '';
diff --git a/ext/pdo_mysql/mysql_statement.c b/ext/pdo_mysql/mysql_statement.c
index b141de79efe..4a2146dd161 100644
--- a/ext/pdo_mysql/mysql_statement.c
+++ b/ext/pdo_mysql/mysql_statement.c
@@ -88,7 +88,8 @@ static int pdo_mysql_stmt_dtor(pdo_stmt_t *stmt) /* {{{ */
 	}
 #endif
 
-	if (IS_OBJ_VALID(EG(objects_store).object_buckets[Z_OBJ_HANDLE(stmt->database_object_handle)])
+	if (!Z_ISUNDEF(stmt->database_object_handle)
+		&& IS_OBJ_VALID(EG(objects_store).object_buckets[Z_OBJ_HANDLE(stmt->database_object_handle)])
 		&& (!(GC_FLAGS(Z_OBJ(stmt->database_object_handle)) & IS_OBJ_FREE_CALLED))) {
 		while (mysql_more_results(S->H->server)) {
 			MYSQL_RES *res;
diff --git a/ext/pdo_pgsql/pgsql_statement.c b/ext/pdo_pgsql/pgsql_statement.c
index 53fea1623a5..fe4c3c0850c 100644
--- a/ext/pdo_pgsql/pgsql_statement.c
+++ b/ext/pdo_pgsql/pgsql_statement.c
@@ -61,7 +61,8 @@
 static int pgsql_stmt_dtor(pdo_stmt_t *stmt)
 {
 	pdo_pgsql_stmt *S = (pdo_pgsql_stmt*)stmt->driver_data;
-	zend_bool server_obj_usable = IS_OBJ_VALID(EG(objects_store).object_buckets[Z_OBJ_HANDLE(stmt->database_object_handle)])
+	zend_bool server_obj_usable = !Z_ISUNDEF(stmt->database_object_handle)
+		&& IS_OBJ_VALID(EG(objects_store).object_buckets[Z_OBJ_HANDLE(stmt->database_object_handle)])
 		&& !(GC_FLAGS(Z_OBJ(stmt->database_object_handle)) & IS_OBJ_FREE_CALLED);
 
 	if (S->result) {