diff --git a/chapters/security.xml b/chapters/security.xml
index a8fdc5df74..9968777b4c 100644
--- a/chapters/security.xml
+++ b/chapters/security.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.36 $ -->
+<!-- $Revision: 1.37 $ -->
  <chapter id="security">
   <title>Security</title>
 
@@ -764,7 +764,7 @@ exec ($evil_var);
    <title>Hiding PHP</title>
    <para>
     A few simple techniques can help to hide PHP, possibly slowing
-    down an attacker who is attempting to disover weaknesses in your
+    down an attacker who is attempting to discover weaknesses in your
     system. By setting expose_php = off in your php.ini file, you
     reduce the amount of information available to them.
    </para>
diff --git a/security/index.xml b/security/index.xml
index a8fdc5df74..9968777b4c 100644
--- a/security/index.xml
+++ b/security/index.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.36 $ -->
+<!-- $Revision: 1.37 $ -->
  <chapter id="security">
   <title>Security</title>
 
@@ -764,7 +764,7 @@ exec ($evil_var);
    <title>Hiding PHP</title>
    <para>
     A few simple techniques can help to hide PHP, possibly slowing
-    down an attacker who is attempting to disover weaknesses in your
+    down an attacker who is attempting to discover weaknesses in your
     system. By setting expose_php = off in your php.ini file, you
     reduce the amount of information available to them.
    </para>