diff --git a/reference/network/functions/getprotobyname.xml b/reference/network/functions/getprotobyname.xml
index 2b967815c6..c59d8fbb82 100644
--- a/reference/network/functions/getprotobyname.xml
+++ b/reference/network/functions/getprotobyname.xml
@@ -38,7 +38,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns the protocol number or -1 if the protocol is not found.
+   Returns the protocol number, &return.falseforfailure;.
   </para>
  </refsect1>
 
@@ -52,7 +52,7 @@
 <?php
 $protocol = 'tcp';
 $get_prot = getprotobyname($protocol);
-if ($get_prot == -1) {
+if ($get_prot === FALSE) {
     echo 'Invalid Protocol';
 } else {
     echo 'Protocol #' . $get_prot;