diff --git a/core/src/main/java/org/apache/struts2/interceptor/csp/CspInterceptor.java b/core/src/main/java/org/apache/struts2/interceptor/csp/CspInterceptor.java
index 49bc04d30..f28e6ec63 100644
--- a/core/src/main/java/org/apache/struts2/interceptor/csp/CspInterceptor.java
+++ b/core/src/main/java/org/apache/struts2/interceptor/csp/CspInterceptor.java
@@ -75,7 +75,7 @@ public final class CspInterceptor extends AbstractInterceptor {
             throw new ConfigurationException(String.format("The class %s doesn't exist!", cspSettingsClassName));
         }
 
-        if (!CspSettings.class.isAssignableFrom(Class.forName(cspSettingsClassName))) {
+        if (!CspSettings.class.isAssignableFrom(cspSettingsClass)) {
             throw new ConfigurationException(String.format("The class %s doesn't implement %s!",
                     cspSettingsClassName, CspSettings.class.getName()));
         }