diff --git a/src/NSubstitute/Proxies/CastleDynamicProxy/CastleDynamicProxyFactory.cs b/src/NSubstitute/Proxies/CastleDynamicProxy/CastleDynamicProxyFactory.cs
index 91cc9e5ac..99be50e05 100644
--- a/src/NSubstitute/Proxies/CastleDynamicProxy/CastleDynamicProxyFactory.cs
+++ b/src/NSubstitute/Proxies/CastleDynamicProxy/CastleDynamicProxyFactory.cs
@@ -164,7 +164,7 @@ private static void VerifyClassHasNotBeenPassedAsAnAdditionalInterface(Type[]? a
             }
         }
 
-        private static bool HasItems<T>(T[]? array) => array?.Length != 0;
+        private static bool HasItems<T>(T[]? array) => array?.Length > 0;
 
         private class AllMethodsExceptCallRouterCallsHook : AllMethodsHook
         {