diff --git a/CppCoreGuidelines.md b/CppCoreGuidelines.md
index c312b5e..b86931f 100644
--- a/CppCoreGuidelines.md
+++ b/CppCoreGuidelines.md
@@ -2122,7 +2122,7 @@ This will force every derived class to compute a center -- even if that's non-tr
         // ...
         // ... no data members ...
         // ...
-        virtual ~Shape() = 0;
+        virtual ~Shape() = default;
     };
 
 ##### Enforcement