diff --git a/reference/filesystem/functions/fgetss.xml b/reference/filesystem/functions/fgetss.xml
index 991e04fc03..2c3b5e6d73 100644
--- a/reference/filesystem/functions/fgetss.xml
+++ b/reference/filesystem/functions/fgetss.xml
@@ -16,7 +16,7 @@
   </methodsynopsis>
   <para>
    Identical to <function>fgets</function>, except that
-   <function>fgetss</function> attempts to strip any HTML and PHP tags from
+   <function>fgetss</function> attempts to strip any NUL bytes, HTML and PHP tags from
    the text it reads.
   </para>
  </refsect1>
diff --git a/reference/strings/functions/strip-tags.xml b/reference/strings/functions/strip-tags.xml
index d513be911e..0dc856b22f 100644
--- a/reference/strings/functions/strip-tags.xml
+++ b/reference/strings/functions/strip-tags.xml
@@ -14,7 +14,7 @@
    <methodparam choice="opt"><type>string</type><parameter>allowable_tags</parameter></methodparam>
   </methodsynopsis>
   <para>
-   This function tries to return a string with all HTML and PHP tags stripped
+   This function tries to return a string with all NUL bytes, HTML and PHP tags stripped
    from a given <parameter>str</parameter>.  It uses the same tag stripping
    state machine as the <function>fgetss</function> function.
   </para>