diff --git a/reference/filesystem/functions/mkdir.xml b/reference/filesystem/functions/mkdir.xml
index e3ad8fc22f..cc109423e2 100644
--- a/reference/filesystem/functions/mkdir.xml
+++ b/reference/filesystem/functions/mkdir.xml
@@ -147,7 +147,7 @@ $structure = './depth1/depth2/depth3/';
 
 if(!mkdir($structure, 0, true))
 {
-	die('Failed to create folders...');
+    die('Failed to create folders...');
 }
 
 /* ... */
diff --git a/reference/spl_types/setup.xml b/reference/spl_types/setup.xml
index 29c927d8ce..cd1ace5ce6 100644
--- a/reference/spl_types/setup.xml
+++ b/reference/spl_types/setup.xml
@@ -22,7 +22,7 @@
    &pecl.windows.download;
   </para>
  </section>
-	
+
  <section xml:id="spl-types.configuration">
   &reftitle.runtime;
   &no.config;
diff --git a/reference/wincache/functions/wincache-ucache-exists.xml b/reference/wincache/functions/wincache-ucache-exists.xml
index e5019a5b7c..af8083ffe1 100644
--- a/reference/wincache/functions/wincache-ucache-exists.xml
+++ b/reference/wincache/functions/wincache-ucache-exists.xml
@@ -49,7 +49,7 @@
 <![CDATA[
 <?php
 if (!wincache_ucache_exists('green'))
-	wincache_ucache_set('green', 1);
+    wincache_ucache_set('green', 1);
 var_dump(wincache_ucache_exists('green'));
 ?>
 ]]>