diff --git a/src/wp-includes/functions.php b/src/wp-includes/functions.php
index 87ba0ae515..512d5c4baa 100644
--- a/src/wp-includes/functions.php
+++ b/src/wp-includes/functions.php
@@ -4386,7 +4386,7 @@ function _canonical_charset( $charset ) {
 }
 
 /**
- * Sets the mbstring internal encoding to a binary safe encoding whne func_overload is enabled.
+ * Sets the mbstring internal encoding to a binary safe encoding when func_overload is enabled.
  *
  * When mbstring.func_overload is in use for multi-byte encodings, the results from strlen() and
  * similar functions respect the utf8 characters, causing binary data to return incorrect lengths.