diff --git a/scripts/ssh/ssh-connect.php b/scripts/ssh/ssh-connect.php
index 8a14209..12fee70 100755
--- a/scripts/ssh/ssh-connect.php
+++ b/scripts/ssh/ssh-connect.php
@@ -65,4 +65,8 @@ array_unshift($arguments, $pattern);
 $err = newv('PhutilExecPassthru', $arguments)
   ->execute();
 
+if (isset($key)) {
+  $key->nuke();
+}
+
 exit($err);
diff --git a/src/applications/passphrase/keys/PassphraseSSHKey.php b/src/applications/passphrase/keys/PassphraseSSHKey.php
index 4ba5025..ee9f92b 100644
--- a/src/applications/passphrase/keys/PassphraseSSHKey.php
+++ b/src/applications/passphrase/keys/PassphraseSSHKey.php
@@ -37,4 +37,10 @@ final class PassphraseSSHKey extends PassphraseAbstractKey {
     return $credential->getSecret();
   }
 
+  public function nuke() {
+    if ($this->keyFile) {
+      $this->keyFile->__destruct();
+    }
+  }
+
 }