diff --git a/docs/configuration.md b/docs/configuration.md
index 419af2d8..4d0d6531 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -128,7 +128,8 @@ Catch's selection, by defining either `CATCH_CONFIG_CPP11_TO_STRING` or
 
     CATCH_CONFIG_CPP17_UNCAUGHT_EXCEPTIONS  // Use std::uncaught_exceptions instead of std::uncaught_exception
     CATCH_CONFIG_CPP17_STRING_VIEW          // Provide StringMaker specialization for std::string_view
-    CATCH_CONFIG_CPP17_VARIANT              // Override C++17 detection for CATCH_CONFIG_ENABLE_VARIANT_STRINGMAKER
+    CATCH_CONFIG_CPP17_VARIANT              // Override std::variant support detection (checked by CATCH_CONFIG_ENABLE_VARIANT_STRINGMAKER)
+    CATCH_CONFIG_CPP17_OPTIONAL             // Override std::optional support detection (checked by CATCH_CONFIG_ENABLE_OPTIONAL_STRINGMAKER)
 
 Catch contains basic compiler/standard detection and attempts to use
 some C++17 features whenever appropriate. This automatic detection