diff --git a/debian/settings.py b/debian/settings.py
index ca1736a..a5de36f 100644
--- a/debian/settings.py
+++ b/debian/settings.py
@@ -167,6 +167,6 @@ LOGGING = {
 
 INSTALLED_APPS += ('wcsinst.wcsinstd',)
 
-for var in ('WCSINST_WCSCTL_SCRIPT', 'WCSINST_URL_TEMPLATE', 'WCS_APP_DIR'):
+for var in ('WCSINST_WCSCTL_SCRIPT', 'WCSINST_URL_TEMPLATE', 'WCSINST_WCS_APP_DIR'):
     if var in os.environ:
         globals()[var] = os.environ[var]