diff --git a/docs/settings.rst b/docs/settings.rst
index dd698a0d..1830a47c 100644
--- a/docs/settings.rst
+++ b/docs/settings.rst
@@ -46,6 +46,7 @@ DJANGO_AWS_SECRET_ACCESS_KEY            AWS_SECRET_ACCESS_KEY       n/a
 DJANGO_AWS_STORAGE_BUCKET_NAME          AWS_STORAGE_BUCKET_NAME     n/a                                            raises error
 DJANGO_AWS_S3_REGION_NAME               AWS_S3_REGION_NAME          n/a                                            None
 DJANGO_GCE_STORAGE_BUCKET_NAME          GS_BUCKET_NAME              n/a                                            raises error
+GOOGLE_APPLICATION_CREDENTIALS          n/a                         n/a                                            raises error
 SENTRY_DSN                              SENTRY_DSN                  n/a                                            raises error
 DJANGO_SENTRY_LOG_LEVEL                 SENTRY_LOG_LEVEL            n/a                                            logging.INFO
 MAILGUN_API_KEY                         MAILGUN_ACCESS_KEY          n/a                                            raises error