diff --git a/src/applications/diffusion/query/diff/svn/DiffusionSvnDiffQuery.php b/src/applications/diffusion/query/diff/svn/DiffusionSvnDiffQuery.php
index a0df4158ba..e56be33a90 100644
--- a/src/applications/diffusion/query/diff/svn/DiffusionSvnDiffQuery.php
+++ b/src/applications/diffusion/query/diff/svn/DiffusionSvnDiffQuery.php
@@ -99,6 +99,7 @@ final class DiffusionSvnDiffQuery extends DiffusionDiffQuery {
     $futures = array_filter($futures);
 
     foreach (Futures($futures) as $key => $future) {
+      $stdout = '';
       try {
         list($stdout) = $future->resolvex();
       } catch (CommandException $e) {