diff --git a/reference/strings/functions/substr.xml b/reference/strings/functions/substr.xml
index 4ea2624391..ec1ccb9ada 100644
--- a/reference/strings/functions/substr.xml
+++ b/reference/strings/functions/substr.xml
@@ -92,7 +92,7 @@ $rest = substr("abcdef", -3, 1); // returns "d"
       </para>
       <para>
        If <parameter>length</parameter> is omitted, the substring starting from
-       <function>start</function> until the end of the string will be
+       <parameter>start</parameter> until the end of the string will be
        returned.
       </para>
       <example>