diff --git a/reference/strings/functions/strcspn.xml b/reference/strings/functions/strcspn.xml
index 085eaccedfa5..981e75884c66 100644
--- a/reference/strings/functions/strcspn.xml
+++ b/reference/strings/functions/strcspn.xml
@@ -127,6 +127,15 @@
      </row>
     </thead>
     <tbody>
+     <row>
+      <entry>8.4.0</entry>
+      <entry>
+       <simpara>
+        Prior to PHP 8.4.0, when <parameter>characters</parameter> was the empty string,
+        the search would incorrectly stop at the first null byte in <parameter>string</parameter>.
+       </simpara>
+      </entry>
+     </row>
      <row>
       <entry>8.0.0</entry>
       <entry>