diff --git a/actionpack/lib/action_controller/metal/http_authentication.rb b/actionpack/lib/action_controller/metal/http_authentication.rb
index 0a36fecd27..2ac6e37e34 100644
--- a/actionpack/lib/action_controller/metal/http_authentication.rb
+++ b/actionpack/lib/action_controller/metal/http_authentication.rb
@@ -397,7 +397,7 @@ module ActionController
     #   RewriteRule ^(.*)$ dispatch.fcgi [E=X-HTTP_AUTHORIZATION:%{HTTP:Authorization},QSA,L]
     module Token
       TOKEN_KEY = 'token='
-      TOKEN_REGEX = /^(Token|Bearer) /
+      TOKEN_REGEX = /^(Token|Bearer)\s+/
       AUTHN_PAIR_DELIMITERS = /(?:,|;|\t+)/
       extend self
 
diff --git a/actionpack/test/controller/http_token_authentication_test.rb b/actionpack/test/controller/http_token_authentication_test.rb
index 9c5a01c318..98e3c891a7 100644
--- a/actionpack/test/controller/http_token_authentication_test.rb
+++ b/actionpack/test/controller/http_token_authentication_test.rb
@@ -94,6 +94,14 @@ class HttpTokenAuthenticationTest < ActionController::TestCase
     assert_response :success
   end
 
+  test "authentication request with tab in header" do
+    @request.env['HTTP_AUTHORIZATION'] = "Token\ttoken=\"lifo\""
+    get :index
+
+    assert_response :success
+    assert_equal 'Hello Secret', @response.body
+  end
+
   test "authentication request without credential" do
     get :display