diff --git a/src/PHPCensor/Plugin/PhpParallelLint.php b/src/PHPCensor/Plugin/PhpParallelLint.php
index 5fa044bb..4a1cd744 100644
--- a/src/PHPCensor/Plugin/PhpParallelLint.php
+++ b/src/PHPCensor/Plugin/PhpParallelLint.php
@@ -60,9 +60,10 @@ class PhpParallelLint extends Plugin
 
         if (isset($options['extensions'])) {
             // Only use if this is a comma delimited list
-            $pattern = '/^[a-z]*,\\ *[a-z]*$/';
+            $pattern = '/^[a-z]*,\ *[a-z]*$/';
+
             if (preg_match($pattern, $options['extensions'])) {
-                $this->extensions = $options['extensions'];
+                $this->extensions = str_replace(' ', '', $options['extensions']);
             }
         }
     }