diff --git a/lib/google/api_client/auth/oauth_1.rb b/lib/google/api_client/auth/oauth_1.rb
index ac9c2e69a..970bfa4c9 100644
--- a/lib/google/api_client/auth/oauth_1.rb
+++ b/lib/google/api_client/auth/oauth_1.rb
@@ -17,6 +17,8 @@ require "oauth"
 
 module Google #:nodoc:
   class APIClient #:nodoc:
+    ##
+    # An OAuth 1.0a handler.
     class OAuth1
       ##
       # The default OAuth 1.0a configuration values.  These may be overrided
diff --git a/lib/google/api_client/discovery/discovery.rb b/lib/google/api_client/discovery/discovery.rb
index 0041825d9..107defebe 100644
--- a/lib/google/api_client/discovery/discovery.rb
+++ b/lib/google/api_client/discovery/discovery.rb
@@ -17,6 +17,8 @@ require "addressable/template"
 
 module Google #:nodoc:
   class APIClient #:nodoc:
+    ##
+    # A discovery document handler.
     class Discovery
       ##
       # The default discovery configuration values.  These may be overrided