diff --git a/travis/pr-check-base.py b/travis/pr-check-base.py
index e4e9ae910..e31e33bcf 100644
--- a/travis/pr-check-base.py
+++ b/travis/pr-check-base.py
@@ -5,14 +5,18 @@ else:
     from urllib.request import urlopen
     from urllib.error import HTTPError
 try:
+    repo = os.environ.get('TRAVIS_REPO_SLUG', 'dfhack/dfhack').lower()
     pr_id = int(os.environ.get('TRAVIS_PULL_REQUEST', 'false'))
 except ValueError:
     print('Not a pull request')
     sys.exit(0)
-print('Pull request %i' % pr_id)
+print('Pull request %s#%i' % (repo, pr_id))
+if repo != 'dfhack/dfhack':
+    print('Not in dfhack/dfhack')
+    sys.exit(0)
 res = {}
 try:
-    res = json.loads(urlopen('https://api.github.com/repos/dfhack/dfhack/pulls/%i' % pr_id).read().decode('utf-8'))
+    res = json.loads(urlopen('https://api.github.com/repos/%s/pulls/%i' % (repo, pr_id)).read().decode('utf-8'))
 except ValueError:
     pass
 except HTTPError: