diff --git a/reference/strings/functions/stristr.xml b/reference/strings/functions/stristr.xml
index fe483d81b5..0a3f2a89ea 100644
--- a/reference/strings/functions/stristr.xml
+++ b/reference/strings/functions/stristr.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.20 $ -->
+<!-- $Revision: 1.21 $ -->
 <refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.stristr">
  <refnamediv>
   <refname>stristr</refname>
@@ -47,7 +47,7 @@
       <para>
        If &true; (the default is &false;), <function>stristr</function>
        returns the part of the <parameter>haystack</parameter> before the
-       first occurence of the <parameter>needle</parameter>.
+       first occurrence of the <parameter>needle</parameter>.
       </para>
      </listitem>
     </varlistentry>
diff --git a/reference/strings/functions/strstr.xml b/reference/strings/functions/strstr.xml
index f2070735d7..d3a6979154 100644
--- a/reference/strings/functions/strstr.xml
+++ b/reference/strings/functions/strstr.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.17 $ -->
+<!-- $Revision: 1.18 $ -->
 <refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.strstr">
  <refnamediv>
   <refname>strstr</refname>
@@ -61,7 +61,7 @@
       <para>
        If &true; (the default is &false;), <function>strstr</function> returns
        the part of the <parameter>haystack</parameter> before the first
-       occurence of the <parameter>needle</parameter>.
+       occurrence of the <parameter>needle</parameter>.
       </para>
      </listitem>
     </varlistentry>