diff --git a/subjects/isalpha.en.md b/subjects/isalpha.en.md
index 298a9f02..09b52f81 100644
--- a/subjects/isalpha.en.md
+++ b/subjects/isalpha.en.md
@@ -2,7 +2,7 @@
 
 ### Instructions
 
-Write a function that returns `true` if the `string` passed in parameter only contains alphanumerical characters, and that returns `false` otherwise.
+Write a function that returns `true` if the `string` passed in parameter only contains alphanumerical characters or is empty, and that returns `false` otherwise.
 
 ### Expected function