diff --git a/src/lint/linter/ArcanistPuppetLintLinter.php b/src/lint/linter/ArcanistPuppetLintLinter.php
index be2e6076..bc8145c4 100644
--- a/src/lint/linter/ArcanistPuppetLintLinter.php
+++ b/src/lint/linter/ArcanistPuppetLintLinter.php
@@ -38,7 +38,7 @@ final class ArcanistPuppetLintLinter extends ArcanistExternalLinter {
     list($stdout) = execx('%C --version', $this->getExecutableCommand());
 
     $matches = array();
-    $regex = '/^Puppet-lint (?P<version>\d+\.\d+\.\d+)$/';
+    $regex = '/^puppet-lint (?P<version>\d+\.\d+\.\d+)$/';
     if (preg_match($regex, $stdout, $matches)) {
       return $matches['version'];
     } else {