diff --git a/CPP20.md b/CPP20.md
index 55ae236..bd23c48 100644
--- a/CPP20.md
+++ b/CPP20.md
@@ -19,7 +19,7 @@ C++20 includes the following new language features:
 - [lambda capture of parameter pack](#lambda-capture-of-parameter-pack)
 - [char8_t](#char8_t)
 - [constinit](#constinit)
-- [__VA_OPT__](#__VA_OPT__)
+- [\_\_VA\_OPT\_\_](#__VA_OPT__)
 
 C++20 includes the following new library features:
 - [concepts library](#concepts-library)
@@ -450,7 +450,7 @@ constinit const char* c = f(true); // OK
 constinit const char* d = g(false); // ERROR: `g` is not constexpr, so `d` cannot be evaluated at compile-time.
 ```
 
-### `__VA_OPT__`
+### \_\_VA\_OPT\_\_
 Helps support variadic macros by evaluating to the given argument if the variadic macro is non-empty.
 ```c++
 #define F(...) f(0 __VA_OPT__(,) __VA_ARGS__)
diff --git a/README.md b/README.md
index d4eb394..feb28d2 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ C++20 includes the following new language features:
 - [lambda capture of parameter pack](#lambda-capture-of-parameter-pack)
 - [char8_t](#char8_t)
 - [constinit](#constinit)
-- [__VA_OPT__](#__VA_OPT__)
+- [\_\_VA\_OPT\_\_](#__VA_OPT__)
 
 C++20 includes the following new library features:
 - [concepts library](#concepts-library)
@@ -554,7 +554,7 @@ constinit const char* c = f(true); // OK
 constinit const char* d = g(false); // ERROR: `g` is not constexpr, so `d` cannot be evaluated at compile-time.
 ```
 
-### `__VA_OPT__`
+### \_\_VA\_OPT\_\_
 Helps support variadic macros by evaluating to the given argument if the variadic macro is non-empty.
 ```c++
 #define F(...) f(0 __VA_OPT__(,) __VA_ARGS__)