diff --git a/XML/RPC2/Backend/Php/Request.php b/XML/RPC2/Backend/Php/Request.php
index e279362..50c16bc 100644
--- a/XML/RPC2/Backend/Php/Request.php
+++ b/XML/RPC2/Backend/Php/Request.php
@@ -163,7 +163,7 @@ public function encode()
 
         $result = '<?xml version="1.0" encoding="' . $this->_encoding . '"?>' . "\n";
         $result .= "<methodCall>";
-        $result .= "<methodName>${methodName}</methodName>";
+        $result .= "<methodName>{$methodName}</methodName>";
         $result .= "<params>";
         foreach($parameters as $parameter) {
             $result .= "<param><value>";
diff --git a/XML/RPC2/Backend/Xmlrpcext/Client.php b/XML/RPC2/Backend/Xmlrpcext/Client.php
index a521bf5..ae559ae 100644
--- a/XML/RPC2/Backend/Xmlrpcext/Client.php
+++ b/XML/RPC2/Backend/Xmlrpcext/Client.php
@@ -126,7 +126,7 @@ public function __call($methodName, $parameters)
         */
         if (is_array($result) && xmlrpc_is_fault($result)) {
             if ($this->debug) {
-                print "XML_RPC2_FaultException(${result['faultString']}, ${result['faultCode']})";
+                print "XML_RPC2_FaultException({$result['faultString']}, {$result['faultCode']})";
             }
             throw new XML_RPC2_FaultException($result['faultString'], $result['faultCode']);
         }