diff --git a/django/core/management/commands/makemessages.py b/django/core/management/commands/makemessages.py
index 0ee6327357..2b47c81bf7 100644
--- a/django/core/management/commands/makemessages.py
+++ b/django/core/management/commands/makemessages.py
@@ -136,7 +136,7 @@ class BuildFile(object):
 
         return re.sub(
             r'^(#: .*)(' + re.escape(old_path) + r')',
-            r'\1' + new_path,
+            lambda match: match.group().replace(old_path, new_path),
             msgs,
             flags=re.MULTILINE
         )
diff --git a/tests/i18n/commands/templates/test.html b/tests/i18n/commands/templates/test.html
index b4b896fcef..cac034e63e 100644
--- a/tests/i18n/commands/templates/test.html
+++ b/tests/i18n/commands/templates/test.html
@@ -72,6 +72,8 @@ continued here.{% endcomment %}
 
 <!-- Source file inside a msgid, should be left as-is. -->
 {% trans "#: templates/test.html.py" %}
+<!-- Deliberate duplicated string. -->
+{% trans "This literal should be included." %}
 
 {% blocktrans context "Special blocktrans context #1" %}Translatable literal #8a{% endblocktrans %}
 {% blocktrans count 2 context "Special blocktrans context #2" %}Translatable literal #8b-singular{% plural %}Translatable literal #8b-plural{% endblocktrans %}