diff --git a/CppCoreGuidelines.md b/CppCoreGuidelines.md
index 7b02c0d..571319d 100644
--- a/CppCoreGuidelines.md
+++ b/CppCoreGuidelines.md
@@ -19571,7 +19571,7 @@ It is almost always a bug to mention an unnamed namespace in a header file.
 
     namespace Foo
     {
-        inline constexpr double x = 1.234; // good
+        const double x = 1.234; // good
 
         inline double foo(double y)        // good
         {