diff --git a/subjects/ispowerof2/README.md b/subjects/ispowerof2/README.md
index cb85f0d7..919cfee0 100644
--- a/subjects/ispowerof2/README.md
+++ b/subjects/ispowerof2/README.md
@@ -6,7 +6,7 @@ Write a program that determines if a given number is a power of 2.
 
 This program must print `true` if the given number is a power of 2, otherwise it has to print `false`.
 
-- If there is more than one or no argument the program should print nothing.
+- If there is more than one or no argument, the program should print nothing.
 
 - When there is only one argument, it will always be a positive valid `int`.