diff --git a/src/applications/diffusion/protocol/DiffusionGitCommandEngine.php b/src/applications/diffusion/protocol/DiffusionGitCommandEngine.php
index 168b18caa5..995e156d8e 100644
--- a/src/applications/diffusion/protocol/DiffusionGitCommandEngine.php
+++ b/src/applications/diffusion/protocol/DiffusionGitCommandEngine.php
@@ -1,49 +1,50 @@
 <?php
 
 final class DiffusionGitCommandEngine
   extends DiffusionCommandEngine {
 
   protected function canBuildForRepository(
     PhabricatorRepository $repository) {
     return $repository->isGit();
   }
 
   protected function newFormattedCommand($pattern, array $argv) {
     $pattern = "git {$pattern}";
     return array($pattern, $argv);
   }
 
   protected function newCustomEnvironment() {
     $env = array();
 
     // NOTE: See T2965. Some time after Git 1.7.5.4, Git started fataling if
     // it can not read $HOME. For many users, $HOME points at /root (this
     // seems to be a default result of Apache setup). Instead, explicitly
     // point $HOME at a readable, empty directory so that Git looks for the
     // config file it's after, fails to locate it, and moves on. This is
     // really silly, but seems like the least damaging approach to
     // mitigating the issue.
 
     $env['HOME'] = PhabricatorEnv::getEmptyCWD();
 
     $env['GIT_SSH'] = $this->getSSHWrapper();
+    $env['GIT_SSH_VARIANT'] = 'ssh';
 
     if ($this->isAnyHTTPProtocol()) {
       $uri = $this->getURI();
       if ($uri) {
         $proxy = PhutilHTTPEngineExtension::buildHTTPProxyURI($uri);
         if ($proxy) {
           if ($this->isHTTPSProtocol()) {
             $env_key = 'https_proxy';
           } else {
             $env_key = 'http_proxy';
           }
           $env[$env_key] = (string)$proxy;
         }
       }
     }
 
     return $env;
   }
 
 }