diff --git a/src/Ssh/Exec.php b/src/Ssh/Exec.php
index f951d37..8b73478 100644
--- a/src/Ssh/Exec.php
+++ b/src/Ssh/Exec.php
@@ -29,7 +29,7 @@ public function run($cmd, $pty = null, array $env = array(), $width = 80, $heigh
         $output = stream_get_contents($stdout);
         preg_match('/\[return_code:(.*?)\]/', $output, $match);
         if ((int) $match[1] !== 0) {
-            throw new RuntimeException(stream_get_contents($stderr), (int) $match[1]);
+            throw new RuntimeException(stream_get_contents($stderr) . "\nLast output: " . $output, (int) $match[1]);
         }
 
         return preg_replace('/\[return_code:(.*?)\]/', '', $output);