diff --git a/README.md b/README.md
index f5a7b6ccd72d383ce8410941630509f97c72a62a..f98b6254aa48be4d2eda023481cf0f35d1cb3017 100644
--- a/README.md
+++ b/README.md
@@ -95,7 +95,7 @@ C hello.cc
 C hello_c++20.cc 
 
 Cm hello_m.cc
-Cm hello_c++20.cc 
+Cm hello_c++20_m.cc 
 
 Gh iostream 
 Gh concepts