diff --git a/youtube_dl/extractor/pbs.py b/youtube_dl/extractor/pbs.py
index 56fbe3d56e..64cded7078 100644
--- a/youtube_dl/extractor/pbs.py
+++ b/youtube_dl/extractor/pbs.py
@@ -3,6 +3,9 @@ from __future__ import unicode_literals
 import re
 
 from .common import InfoExtractor
+from ..utils import (
+    US_RATINGS,
+)
 
 
 class PBSIE(InfoExtractor):
@@ -57,6 +60,11 @@ class PBSIE(InfoExtractor):
         info_url = 'http://video.pbs.org/videoInfo/%s?format=json' % video_id
         info = self._download_json(info_url, display_id)
 
+        rating_str = info.get('rating')
+        if rating_str is not None:
+            rating_str = rating_str.rpartition('-')[2]
+        age_limit = US_RATINGS.get(rating_str)
+
         return {
             'id': video_id,
             'title': info['title'],
@@ -65,4 +73,5 @@ class PBSIE(InfoExtractor):
             'description': info['program'].get('description'),
             'thumbnail': info.get('image_url'),
             'duration': info.get('duration'),
+            'age_limit': age_limit,
         }
diff --git a/youtube_dl/extractor/viki.py b/youtube_dl/extractor/viki.py
index 213b04e8bf..15f3152982 100644
--- a/youtube_dl/extractor/viki.py
+++ b/youtube_dl/extractor/viki.py
@@ -6,6 +6,7 @@ from ..utils import (
     ExtractorError,
     unescapeHTML,
     unified_strdate,
+    US_RATINGS,
 )
 from .subtitles import SubtitlesInfoExtractor
 
@@ -48,14 +49,7 @@ class VikiIE(SubtitlesInfoExtractor):
         rating_str = self._html_search_regex(
             r'<strong>Rating: </strong>\s*([^<]*)<', webpage,
             'rating information', default='').strip()
-        RATINGS = {
-            'G': 0,
-            'PG': 10,
-            'PG-13': 13,
-            'R': 16,
-            'NC': 18,
-        }
-        age_limit = RATINGS.get(rating_str)
+        age_limit = US_RATINGS.get(rating_str)
 
         info_url = 'http://www.viki.com/player5_fragment/%s?action=show&controller=videos' % video_id
         info_webpage = self._download_webpage(
diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index f60141bd1b..7809c4e0b8 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -1289,3 +1289,12 @@ if sys.version_info < (3, 0) and sys.platform == 'win32':
         return getpass.getpass(prompt, *args, **kwargs)
 else:
     compat_getpass = getpass.getpass
+
+
+US_RATINGS = {
+    'G': 0,
+    'PG': 10,
+    'PG-13': 13,
+    'R': 16,
+    'NC': 18,
+}