diff --git a/src/Symfony/Component/Translation/Command/XliffLintCommand.php b/src/Symfony/Component/Translation/Command/XliffLintCommand.php
index e96effbcdb..78b1784c97 100644
--- a/src/Symfony/Component/Translation/Command/XliffLintCommand.php
+++ b/src/Symfony/Component/Translation/Command/XliffLintCommand.php
@@ -129,12 +129,12 @@ EOF
         $document->loadXML($content);
 
         if (null !== $targetLanguage = $this->getTargetLanguageFromFile($document)) {
-            $normalizedLocale = preg_quote(str_replace('-', '_', $targetLanguage), '/');
+            $normalizedLocalePattern = sprintf('(%s|%s)', preg_quote($targetLanguage, '/'), preg_quote(str_replace('-', '_', $targetLanguage), '/'));
             // strict file names require translation files to be named '____.locale.xlf'
             // otherwise, both '____.locale.xlf' and 'locale.____.xlf' are allowed
             // also, the regexp matching must be case-insensitive, as defined for 'target-language' values
             // http://docs.oasis-open.org/xliff/v1.2/os/xliff-core.html#target-language
-            $expectedFilenamePattern = $this->requireStrictFileNames ? sprintf('/^.*\.(?i:%s)\.(?:xlf|xliff)/', $normalizedLocale) : sprintf('/^(?:.*\.(?i:%s)|(?i:%s)\..*)\.(?:xlf|xliff)/', $normalizedLocale, $normalizedLocale);
+            $expectedFilenamePattern = $this->requireStrictFileNames ? sprintf('/^.*\.(?i:%s)\.(?:xlf|xliff)/', $normalizedLocalePattern) : sprintf('/^(?:.*\.(?i:%s)|(?i:%s)\..*)\.(?:xlf|xliff)/', $normalizedLocalePattern, $normalizedLocalePattern);
 
             if (0 === preg_match($expectedFilenamePattern, basename($file))) {
                 $errors[] = [
diff --git a/src/Symfony/Component/Translation/Tests/Command/XliffLintCommandTest.php b/src/Symfony/Component/Translation/Tests/Command/XliffLintCommandTest.php
index 4a3351f6ec..c1c545a67f 100644
--- a/src/Symfony/Component/Translation/Tests/Command/XliffLintCommandTest.php
+++ b/src/Symfony/Component/Translation/Tests/Command/XliffLintCommandTest.php
@@ -105,6 +105,17 @@ class XliffLintCommandTest extends TestCase
         $this->assertStringContainsString('[OK] All 1 XLIFF files contain valid syntax.', trim($tester->getDisplay()));
     }
 
+    public function testLintSucceedsWhenLocaleInFileAndInTargetLanguageNameUsesDashesInsteadOfUnderscores()
+    {
+        $tester = $this->createCommandTester();
+        $filename = $this->createFile('note', 'en-GB', 'messages.en-GB.xlf');
+
+        $tester->execute(['filename' => $filename], ['decorated' => false]);
+
+        $this->assertSame(0, $tester->getStatusCode());
+        $this->assertStringContainsString('[OK] All 1 XLIFF files contain valid syntax.', trim($tester->getDisplay()));
+    }
+
     public function testLintFileNotReadable()
     {
         $this->expectException(\RuntimeException::class);