diff --git a/django/utils/translation/trans_real.py b/django/utils/translation/trans_real.py
index 9f930b54ef..edecfeca61 100644
--- a/django/utils/translation/trans_real.py
+++ b/django/utils/translation/trans_real.py
@@ -30,9 +30,9 @@ CONTEXT_SEPARATOR = u"\x04"
 
 # Format of Accept-Language header values. From RFC 2616, section 14.4 and 3.9.
 accept_language_re = re.compile(r'''
-        ([A-Za-z]{1,8}(?:-[A-Za-z]{1,8})*|\*)   # "en", "en-au", "x-y-z", "*"
-        (?:;q=(0(?:\.\d{,3})?|1(?:.0{,3})?))?   # Optional "q=1.00", "q=0.8"
-        (?:\s*,\s*|$)                            # Multiple accepts per header.
+        ([A-Za-z]{1,8}(?:-[A-Za-z]{1,8})*|\*)         # "en", "en-au", "x-y-z", "*"
+        (?:\s*;\s*q=(0(?:\.\d{,3})?|1(?:.0{,3})?))?   # Optional "q=1.00", "q=0.8"
+        (?:\s*,\s*|$)                                 # Multiple accepts per header.
         ''', re.VERBOSE)
 
 language_code_prefix_re = re.compile(r'^/([\w-]+)/')
diff --git a/tests/regressiontests/i18n/tests.py b/tests/regressiontests/i18n/tests.py
index 9c24c3fb40..0b955ad3da 100644
--- a/tests/regressiontests/i18n/tests.py
+++ b/tests/regressiontests/i18n/tests.py
@@ -516,6 +516,7 @@ class MiscTests(TestCase):
         self.assertEqual([('de', 1.0), ('en-au', 0.75), ('en-us', 0.5), ('en', 0.25), ('es', 0.125), ('fa', 0.125)], p('de,en-au;q=0.75,en-us;q=0.5,en;q=0.25,es;q=0.125,fa;q=0.125'))
         self.assertEqual([('*', 1.0)], p('*'))
         self.assertEqual([('de', 1.0)], p('de;q=0.'))
+        self.assertEqual([('en', 1.0), ('*', 0.5)], p('en; q=1.0, * ; q=0.5'))
         self.assertEqual([], p(''))
 
         # Bad headers; should always return [].