diff --git a/core/modules/migrate_drupal/config/install/migrate.migration.d6_system_file.yml b/core/modules/migrate_drupal/config/install/migrate.migration.d6_system_file.yml
index 012238e..50f6680 100644
--- a/core/modules/migrate_drupal/config/install/migrate.migration.d6_system_file.yml
+++ b/core/modules/migrate_drupal/config/install/migrate.migration.d6_system_file.yml
@@ -7,9 +7,16 @@ source:
   variables:
     - file_directory_path
     - file_directory_temp
+    - allow_insecure_uploads
 process:
   'path/private': file_directory_path
   'path/temporary': file_directory_temp
+  allow_insecure_uploads:
+    plugin: static_map
+    source: allow_insecure_uploads
+    map:
+      0: false
+      1: true
 destination:
   plugin: config
   config_name: system.file
diff --git a/core/modules/migrate_drupal/src/Tests/Dump/Drupal6SystemFile.php b/core/modules/migrate_drupal/src/Tests/Dump/Drupal6SystemFile.php
index a3937a1..91eedf3 100644
--- a/core/modules/migrate_drupal/src/Tests/Dump/Drupal6SystemFile.php
+++ b/core/modules/migrate_drupal/src/Tests/Dump/Drupal6SystemFile.php
@@ -30,6 +30,10 @@ public function load() {
       'name' => 'file_directory_temp',
       'value' => 's:10:"files/temp";',
     ))
+    ->values(array(
+      'name' => 'allow_insecure_uploads',
+      'value' => 'i:1;',
+    ))
     ->execute();
   }
 
diff --git a/core/modules/migrate_drupal/src/Tests/d6/MigrateSystemFileTest.php b/core/modules/migrate_drupal/src/Tests/d6/MigrateSystemFileTest.php
index c2809b4..c401940 100644
--- a/core/modules/migrate_drupal/src/Tests/d6/MigrateSystemFileTest.php
+++ b/core/modules/migrate_drupal/src/Tests/d6/MigrateSystemFileTest.php
@@ -41,6 +41,7 @@ public function testSystemFile() {
     $config = \Drupal::config('system.file');
     $this->assertIdentical($config->get('path.private'), 'core/modules/simpletest/files');
     $this->assertIdentical($config->get('path.temporary'), 'files/temp');
+    $this->assertIdentical($config->get('allow_insecure_uploads'), true);
     \Drupal::configFactory()->setOverrideState($old_state);
   }