diff --git a/src/wp-includes/atomlib.php b/src/wp-includes/atomlib.php
index 271635fe45..4ec562c64b 100644
--- a/src/wp-includes/atomlib.php
+++ b/src/wp-includes/atomlib.php
@@ -313,7 +313,7 @@ class AtomParser {
 
     function ns_to_prefix($qname, $attr=false) {
         # split 'http://www.w3.org/1999/xhtml:div' into ('http','//www.w3.org/1999/xhtml','div')
-        $components = split(":", $qname);
+        $components = explode(":", $qname);
 
         # grab the last one (e.g 'div')
         $name = array_pop($components);
diff --git a/src/wp-includes/rss.php b/src/wp-includes/rss.php
index 548ccf2349..71146edc3c 100644
--- a/src/wp-includes/rss.php
+++ b/src/wp-includes/rss.php
@@ -114,7 +114,7 @@ class MagpieRSS {
 		// check for a namespace, and split if found
 		$ns	= false;
 		if ( strpos( $element, ':' ) ) {
-			list($ns, $el) = split( ':', $element, 2);
+			list($ns, $el) = explode( ':', $element, 2);
 		}
 		if ( $ns and $ns != 'rdf' ) {
 			$this->current_namespace = $ns;