diff --git a/core/lib/Drupal/Component/Gettext/PoStreamReader.php b/core/lib/Drupal/Component/Gettext/PoStreamReader.php
index f84d251..eb62831 100644
--- a/core/lib/Drupal/Component/Gettext/PoStreamReader.php
+++ b/core/lib/Drupal/Component/Gettext/PoStreamReader.php
@@ -424,6 +424,9 @@ private function readLine() {
           $this->_current_item['msgstr'] = [];
         }
 
+        // Replace @count[X] elements with @count. For compatibility with
+        // drupal.org translations for Drupal 7.
+        $quoted = preg_replace('!@count\[\d+\]!', '@count', $quoted);
         $this->_current_item['msgstr'][$this->_current_plural_index] = $quoted;
 
         $this->_context = 'MSGSTR_ARR';
diff --git a/core/modules/locale/tests/src/Functional/LocaleImportFunctionalTest.php b/core/modules/locale/tests/src/Functional/LocaleImportFunctionalTest.php
index 581c98f..604f4a1 100644
--- a/core/modules/locale/tests/src/Functional/LocaleImportFunctionalTest.php
+++ b/core/modules/locale/tests/src/Functional/LocaleImportFunctionalTest.php
@@ -362,6 +362,17 @@ public function testCreatedLanguageTranslation() {
   }
 
   /**
+   * Test the translation are imported with fix old Drupal 7 plural style.
+   */
+  public function testCreatedLanguageTranslationWithOldPluralStyle() {
+    $this->importPoFile($this->getPoFileWithOldPluralStyle(), ['langcode' => 'ru']);
+    for ($i=0; $i < 6; $i++) {
+      $plural = \Drupal::translation()->formatPlural($i, '1 word', '@count words', [], ['langcode' => 'ru']);
+      $this->assertNotContains('[2]', $plural->render(), 'Import Drupal 7 plural style with @count[number]');
+    }
+  }
+
+  /**
    * Helper function: import a standalone .po file in a given language.
    *
    * @param string $contents
@@ -640,4 +651,29 @@ public function getPoFileWithConfigDe() {
 EOF;
   }
 
+  /**
+   * Helper function that returns a .po file with Drupal 7 translation style.
+   */
+  public function getPoFileWithOldPluralStyle() {
+    return <<< EOF
+msgid ""
+msgstr ""
+"Project-Id-Version: Drupal 8\\n"
+"MIME-Version: 1.0\\n"
+"Content-Type: text/plain; charset=UTF-8\\n"
+"Content-Transfer-Encoding: 8bit\\n"
+"Plural-Forms: nplurals=5; plural=n;\\n"
+
+msgid "1 word"
+msgid_plural "@count words"
+msgstr[0] "@count слово"
+msgstr[1] "@count слова"
+msgstr[2] "@count[2] слов"
+msgstr[3] "@count[3] словцо"
+msgstr[4] "@count[4] словеса"
+msgstr[5] "@count[5] здесь был Вова"
+
+EOF;
+  }
+
 }