diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -1277,6 +1277,7 @@
     'PhabricatorAuthProviderLDAP' => 'applications/auth/provider/PhabricatorAuthProviderLDAP.php',
     'PhabricatorAuthProviderOAuth' => 'applications/auth/provider/PhabricatorAuthProviderOAuth.php',
     'PhabricatorAuthProviderOAuth1' => 'applications/auth/provider/PhabricatorAuthProviderOAuth1.php',
+    'PhabricatorAuthProviderOAuth1Bitbucket' => 'applications/auth/provider/PhabricatorAuthProviderOAuth1Bitbucket.php',
     'PhabricatorAuthProviderOAuth1JIRA' => 'applications/auth/provider/PhabricatorAuthProviderOAuth1JIRA.php',
     'PhabricatorAuthProviderOAuth1Twitter' => 'applications/auth/provider/PhabricatorAuthProviderOAuth1Twitter.php',
     'PhabricatorAuthProviderOAuth2' => 'applications/auth/provider/PhabricatorAuthProviderOAuth2.php',
@@ -4073,6 +4074,7 @@
     'PhabricatorAuthProviderLDAP' => 'PhabricatorAuthProvider',
     'PhabricatorAuthProviderOAuth' => 'PhabricatorAuthProvider',
     'PhabricatorAuthProviderOAuth1' => 'PhabricatorAuthProviderOAuth',
+    'PhabricatorAuthProviderOAuth1Bitbucket' => 'PhabricatorAuthProviderOAuth1',
     'PhabricatorAuthProviderOAuth1JIRA' => 'PhabricatorAuthProviderOAuth1',
     'PhabricatorAuthProviderOAuth1Twitter' => 'PhabricatorAuthProviderOAuth1',
     'PhabricatorAuthProviderOAuth2' => 'PhabricatorAuthProviderOAuth',
diff --git a/src/applications/auth/provider/PhabricatorAuthProviderOAuth1Bitbucket.php b/src/applications/auth/provider/PhabricatorAuthProviderOAuth1Bitbucket.php
new file mode 100644
--- /dev/null
+++ b/src/applications/auth/provider/PhabricatorAuthProviderOAuth1Bitbucket.php
@@ -0,0 +1,27 @@
+<?php
+
+final class PhabricatorAuthProviderOAuth1Bitbucket
+  extends PhabricatorAuthProviderOAuth1 {
+
+  public function getProviderName() {
+    return pht('Bitbucket');
+  }
+
+  public function getProviderConfigurationHelp() {
+    return pht(
+      "To configure Bitbucket OAuth, log in to Bitbucket and go to ".
+      "**Manage Account** > **Access Management** > **OAuth**.\n\n".
+      "Click **Add Consumer** and create a new application.\n\n".
+      "After completing configuration, copy the **Key** and ".
+      "**Secret** to the fields above.");
+  }
+
+  protected function newOAuthAdapter() {
+    return new PhutilAuthAdapterOAuthBitbucket();
+  }
+
+  protected function getLoginIcon() {
+    return 'Bitbucket';
+  }
+
+}