diff --git a/threads-locks/README.md b/threads-locks/README.md
index 6cd1a1d..e1da96b 100644
--- a/threads-locks/README.md
+++ b/threads-locks/README.md
@@ -40,8 +40,9 @@ correct; the second call does not because the old value is wrong.
 
 To compile and run:
 ```sh
-prompt> gcc -o compare_and_swap compare_and_swap.c -Wall
-prompt> ./compare_and_swap
+prompt> gcc -o compare-and-swap compare-and-swap.c -Wall
+prompt> ./compare-and-swap
 ```
 
 
+