diff --git a/src/mbyte.c b/src/mbyte.c
index 93375bc..96ad26f 100644
--- a/src/mbyte.c
+++ b/src/mbyte.c
@@ -2625,7 +2625,8 @@
 }
 
 /*
- * Return the character length of "str".  multi-byte characters counts as one.
+ * Return the character length of "str".  Each multi-byte character counts as
+ * one.
  */
     int
 mb_charlen(str)