diff --git a/app/extensions/extension_copy.php b/app/extensions/extension_copy.php
index 1f9a8d3563..d717ba3fd3 100644
--- a/app/extensions/extension_copy.php
+++ b/app/extensions/extension_copy.php
@@ -17,23 +17,27 @@
 
 	The Initial Developer of the Original Code is
 	Mark J Crane <markjcrane@fusionpbx.com>
-	Portions created by the Initial Developer are Copyright (C) 2008-2012
+	Portions created by the Initial Developer are Copyright (C) 2008-2016
 	the Initial Developer. All Rights Reserved.
 
 	Contributor(s):
 	Mark J Crane <markjcrane@fusionpbx.com>
 */
-include "root.php";
-require_once "resources/require.php";
-require_once "resources/check_auth.php";
-require_once "resources/paging.php";
-if (permission_exists('extension_add')) {
-	//access granted
-}
-else {
-	echo "access denied";
-	exit;
-}
+
+//includes
+	include "root.php";
+	require_once "resources/require.php";
+	require_once "resources/check_auth.php";
+	require_once "resources/paging.php";
+
+//check permissions
+	if (permission_exists('extension_add')) {
+		//access granted
+	}
+	else {
+		echo "access denied";
+		exit;
+	}
 
 //add multi-lingual support
 	$language = new text;
@@ -47,7 +51,21 @@ else {
 			$number_alias_new = check_str($_REQUEST["alias"]);
 		}
 	}
-
+	
+// skip the copy if the domain extension already exists
+	$ext = new extension;
+	$ext->db = $db;
+	if ($ext->exists($domain_uuid, $extension_new)) {
+		//begin the page content
+		require_once "resources/header.php";
+		
+		echo "<div align='center'>".$text['message-duplicate']."<br />";
+		echo "	<input type='button' class='btn' alt='".$text['button-back']."' onclick=\"window.location='./extension_edit.php?id=".$extension_uuid."';\" value='".$text['button-back']."'>\n";
+		echo "</div>";
+		require_once "resources/footer.php";
+		return;
+	}
+	
 //get the v_extensions data
 	$sql = "select * from v_extensions ";
 	$sql .= "where domain_uuid = '$domain_uuid' ";
@@ -228,4 +246,4 @@ else {
 	header("Location: extensions.php");
 	return;
 
-?>
\ No newline at end of file
+?>
diff --git a/app/extensions/resources/classes/extension.php b/app/extensions/resources/classes/extension.php
index fd09e9bd0f..25f99b7224 100644
--- a/app/extensions/resources/classes/extension.php
+++ b/app/extensions/resources/classes/extension.php
@@ -17,7 +17,7 @@
 
 	The Initial Developer of the Original Code is
 	Mark J Crane <markjcrane@fusionpbx.com>
-	Copyright (C) 2010 - 2014
+	Copyright (C) 2010 - 2016
 	All Rights Reserved.
 
 	Contributor(s):
@@ -518,6 +518,18 @@ if (!class_exists('extension')) {
 					$_SESSION["reload_xml"] = true;
 			}
 		}
+
+		// returns true if the domain extension already exists
+		public function exists($domain_uuid, $extension) {
+			$sql = "select * from v_extensions where domain_uuid = '".$domain_uuid."' ";
+			$sql .= "and extension='".$extension."'";
+			
+			$prep_statement = $this->db->prepare(check_sql($sql));
+			$prep_statement->execute();
+			$result = $prep_statement->fetchAll(PDO::FETCH_NAMED);
+			
+			return count($result) != 0;
+		}
 	}
 }