diff --git a/subjects/onlyf/README.md b/subjects/onlyf/README.md
index d25150304..c308f14a2 100644
--- a/subjects/onlyf/README.md
+++ b/subjects/onlyf/README.md
@@ -2,7 +2,7 @@
 
 ### Instructions
 
-Write a program that displays an `f` character on the standard output.
+Write a program that displays an `f` character on the standard output and nothing else.
 
 ### Usage