diff --git a/clang/lib/Frontend/InitPreprocessor.cpp b/clang/lib/Frontend/InitPreprocessor.cpp
--- a/clang/lib/Frontend/InitPreprocessor.cpp
+++ b/clang/lib/Frontend/InitPreprocessor.cpp
@@ -696,6 +696,8 @@
     Builder.defineMacro("__cpp_if_consteval", "202106L");
     Builder.defineMacro("__cpp_multidimensional_subscript", "202110L");
   }
+  Builder.defineMacro("__cpp_named_character_escapes", "202207L");
+
   if (LangOpts.Char8)
     Builder.defineMacro("__cpp_char8_t", "201811L");
   Builder.defineMacro("__cpp_impl_destroying_delete", "201806L");
diff --git a/clang/test/Lexer/cxx-features.cpp b/clang/test/Lexer/cxx-features.cpp
--- a/clang/test/Lexer/cxx-features.cpp
+++ b/clang/test/Lexer/cxx-features.cpp
@@ -51,7 +51,7 @@
 #error "wrong value for __cpp_static_call_operator"
 #endif
 
-#if check(named_character_escapes, 0, 0, 0, 0, 0, 0)
+#if check(named_character_escapes, 202207L, 202207L, 202207L, 202207L, 202207L, 202207L)
 #error "wrong value for __cpp_named_character_escapes"
 #endif