diff --git a/core/src/main/java/com/opensymphony/xwork2/config/providers/XmlDocConfigurationProvider.java b/core/src/main/java/com/opensymphony/xwork2/config/providers/XmlDocConfigurationProvider.java
index bae553789..cad52fb79 100644
--- a/core/src/main/java/com/opensymphony/xwork2/config/providers/XmlDocConfigurationProvider.java
+++ b/core/src/main/java/com/opensymphony/xwork2/config/providers/XmlDocConfigurationProvider.java
@@ -142,7 +142,9 @@ public abstract class XmlDocConfigurationProvider implements ConfigurationProvid
 
     @Override
     public void destroy() {
-        providerAllowlist.clearAllowlist(this);
+        if (providerAllowlist != null) {
+            providerAllowlist.clearAllowlist(this);
+        }
     }
 
     protected Class<?> allowAndLoadClass(String className) throws ClassNotFoundException {