diff --git a/CPP17.md b/CPP17.md
index 357de77..e22ae62 100644
--- a/CPP17.md
+++ b/CPP17.md
@@ -287,7 +287,7 @@ std::string_view cppstr{ "foo" };
 std::wstring_view wcstr_v{ L"baz" };
 // Character arrays.
 char array[3] = {'b', 'a', 'r'};
-std::string_view array_v(array, sizeof array);
+std::string_view array_v(array, std::size(array));
 ```
 ```c++
 std::string str{ "   trim me" };
diff --git a/README.md b/README.md
index b553f8c..6943aaf 100644
--- a/README.md
+++ b/README.md
@@ -346,7 +346,7 @@ std::string_view cppstr{ "foo" };
 std::wstring_view wcstr_v{ L"baz" };
 // Character arrays.
 char array[3] = {'b', 'a', 'r'};
-std::string_view array_v(array, sizeof array);
+std::string_view array_v(array, std::size(array));
 ```
 ```c++
 std::string str{ "   trim me" };