diff --git a/src/Schema/PostgreSQLSchemaManager.php b/src/Schema/PostgreSQLSchemaManager.php
index 7583c4d0234..87df0457f62 100644
--- a/src/Schema/PostgreSQLSchemaManager.php
+++ b/src/Schema/PostgreSQLSchemaManager.php
@@ -651,6 +651,7 @@ protected function selectTableColumns(string $databaseName, ?string $tableName =
                 LEFT JOIN pg_depend d
                     ON d.objid = c.oid
                         AND d.deptype = 'e'
+                        AND d.classid = (SELECT oid FROM pg_class WHERE relname = 'pg_class')
 SQL;
 
         $conditions = array_merge([
diff --git a/tests/Functional/Schema/PostgreSQLSchemaManagerTest.php b/tests/Functional/Schema/PostgreSQLSchemaManagerTest.php
index 4cfe1e9d832..cdfefd1d73e 100644
--- a/tests/Functional/Schema/PostgreSQLSchemaManagerTest.php
+++ b/tests/Functional/Schema/PostgreSQLSchemaManagerTest.php
@@ -2,6 +2,7 @@
 
 namespace Doctrine\DBAL\Tests\Functional\Schema;
 
+use Doctrine\DBAL\Driver\ServerInfoAwareConnection;
 use Doctrine\DBAL\Exception\DatabaseObjectNotFoundException;
 use Doctrine\DBAL\Platforms\AbstractPlatform;
 use Doctrine\DBAL\Platforms\PostgreSQLPlatform;
@@ -27,6 +28,8 @@
 use function array_unshift;
 use function assert;
 use function count;
+use function preg_match;
+use function sprintf;
 use function strtolower;
 
 class PostgreSQLSchemaManagerTest extends SchemaManagerFunctionalTestCase
@@ -561,6 +564,73 @@ public function testAlterTableAutoIncrementIntToBigInt(
         self::assertTrue($tableFinal->getColumn('id')->getAutoincrement());
     }
 
+    public function testListTableColumnsOidConflictWithNonTableObject(): void
+    {
+        $versionParts      = [];
+        $wrappedConnection = $this->connection->getWrappedConnection();
+        assert($wrappedConnection instanceof ServerInfoAwareConnection);
+        assert(preg_match('/^(?P<major>\d+)/', $wrappedConnection->getServerVersion(), $versionParts) > 0);
+
+        $majorVersion = $versionParts['major'];
+        if ($majorVersion === '9') {
+            self::markTestSkipped('Manually setting the Oid is not supported in 9.4');
+        }
+
+        $table = 'test_list_table_columns_oid_conflicts';
+        $this->connection->executeStatement(sprintf('CREATE TABLE IF NOT EXISTS %s(id INT NOT NULL)', $table));
+        $beforeColumns = $this->schemaManager->listTableColumns($table);
+        $this->assertArrayHasKey('id', $beforeColumns);
+
+        $this->connection->executeStatement('CREATE EXTENSION IF NOT EXISTS pg_prewarm');
+        $originalTableOid = $this->connection->fetchOne(
+            'SELECT oid FROM pg_class WHERE pg_class.relname = ?',
+            [$table],
+        );
+
+        $getConflictingOidSql = <<<'SQL'
+SELECT objid
+FROM pg_depend
+JOIN pg_extension as ex on ex.oid = pg_depend.refobjid
+WHERE ex.extname = 'pg_prewarm'
+ORDER BY objid
+LIMIT 1
+SQL;
+        $conflictingOid       = $this->connection->fetchOne($getConflictingOidSql);
+
+        $this->connection->executeStatement(
+            'UPDATE pg_attribute SET attrelid = ? WHERE attrelid = ?',
+            [$conflictingOid, $originalTableOid],
+        );
+        $this->connection->executeStatement(
+            'UPDATE pg_description SET objoid = ? WHERE objoid = ?',
+            [$conflictingOid, $originalTableOid],
+        );
+        $this->connection->executeStatement(
+            'UPDATE pg_class SET oid = ? WHERE oid = ?',
+            [$conflictingOid, $originalTableOid],
+        );
+
+        $afterColumns = $this->schemaManager->listTableColumns($table);
+
+        // revert to the database to original state prior to asserting result
+        $this->connection->executeStatement(
+            'UPDATE pg_attribute SET attrelid = ? WHERE attrelid = ?',
+            [$originalTableOid, $conflictingOid],
+        );
+        $this->connection->executeStatement(
+            'UPDATE pg_description SET objoid = ? WHERE objoid = ?',
+            [$originalTableOid, $conflictingOid],
+        );
+        $this->connection->executeStatement(
+            'UPDATE pg_class SET oid = ? WHERE oid = ?',
+            [$originalTableOid, $conflictingOid],
+        );
+        $this->connection->executeStatement(sprintf('DROP TABLE IF EXISTS %s', $table));
+        $this->connection->executeStatement('DROP EXTENSION IF EXISTS pg_prewarm');
+
+        $this->assertArrayHasKey('id', $afterColumns);
+    }
+
     /** @return iterable<mixed[]> */
     public static function autoIncrementTypeMigrations(): iterable
     {