diff --git a/django/conf/locale/en/LC_MESSAGES/django.po b/django/conf/locale/en/LC_MESSAGES/django.po
index a1709b8de4..63ac1bea97 100644
--- a/django/conf/locale/en/LC_MESSAGES/django.po
+++ b/django/conf/locale/en/LC_MESSAGES/django.po
@@ -12,6 +12,7 @@ msgstr ""
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
 
 #: conf/global_settings.py:51
 msgid "Afrikaans"
diff --git a/django/contrib/admin/locale/en/LC_MESSAGES/django.po b/django/contrib/admin/locale/en/LC_MESSAGES/django.po
index 7ff8058669..7c50d9a305 100644
--- a/django/contrib/admin/locale/en/LC_MESSAGES/django.po
+++ b/django/contrib/admin/locale/en/LC_MESSAGES/django.po
@@ -12,6 +12,7 @@ msgstr ""
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
 
 #: contrib/admin/actions.py:50
 #, python-format
diff --git a/django/contrib/auth/locale/en/LC_MESSAGES/django.po b/django/contrib/auth/locale/en/LC_MESSAGES/django.po
index 147b244e37..cf037cdf59 100644
--- a/django/contrib/auth/locale/en/LC_MESSAGES/django.po
+++ b/django/contrib/auth/locale/en/LC_MESSAGES/django.po
@@ -12,6 +12,7 @@ msgstr ""
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
 
 #: contrib/auth/admin.py:49
 msgid "Personal info"
diff --git a/django/contrib/humanize/locale/en/LC_MESSAGES/django.po b/django/contrib/humanize/locale/en/LC_MESSAGES/django.po
index c406066732..f39cfde0aa 100644
--- a/django/contrib/humanize/locale/en/LC_MESSAGES/django.po
+++ b/django/contrib/humanize/locale/en/LC_MESSAGES/django.po
@@ -12,6 +12,7 @@ msgstr ""
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
 
 #: contrib/humanize/apps.py:8
 msgid "Humanize"