diff --git a/lib/Doctrine/ruleset.xml b/lib/Doctrine/ruleset.xml
index f6579c5e..e7be0f7d 100644
--- a/lib/Doctrine/ruleset.xml
+++ b/lib/Doctrine/ruleset.xml
@@ -504,7 +504,9 @@
     <!-- Require PHP function calls in lowercase -->
     <rule ref="Squiz.PHP.LowercasePHPFunctions"/>
     <!-- Forbid dead code -->
-    <rule ref="Squiz.PHP.NonExecutableCode"/>
+    <rule ref="Squiz.PHP.NonExecutableCode">
+        <type>error</type>
+    </rule>
     <!-- Forbid `$this` inside static function -->
     <rule ref="Squiz.Scope.StaticThisUsage"/>
     <!-- Force whitespace before and after concatenation -->