diff --git a/storages/backends/gs.py b/storages/backends/gs.py
index cbda3bc..fa86e11 100644
--- a/storages/backends/gs.py
+++ b/storages/backends/gs.py
@@ -94,4 +94,5 @@ def _get_or_create_bucket(self, name):
                 return bucket
             raise ImproperlyConfigured("Bucket %s does not exist. Buckets "
                                        "can be automatically created by "
-                                       "setting appropriate setting." % name)
+                                       "setting GS_AUTO_CREATE_BUCKET to "
+                                       "``True``." % name)
diff --git a/storages/backends/s3boto.py b/storages/backends/s3boto.py
index dc5f6e9..4da01e7 100644
--- a/storages/backends/s3boto.py
+++ b/storages/backends/s3boto.py
@@ -306,7 +306,8 @@ def _get_or_create_bucket(self, name):
                 return bucket
             raise ImproperlyConfigured("Bucket %s does not exist. Buckets "
                                        "can be automatically created by "
-                                       "setting appropriate setting." % name)
+                                       "setting AWS_AUTO_CREATE_BUCKET to "
+                                       "``True``." % name)
 
     def _clean_name(self, name):
         """