diff --git a/html/includes/api_functions.inc.php b/html/includes/api_functions.inc.php
index 7141e7bbce..37bf96d981 100644
--- a/html/includes/api_functions.inc.php
+++ b/html/includes/api_functions.inc.php
@@ -795,7 +795,39 @@ function ack_alert() {
     $app->response->setStatus($code);
     $app->response->headers->set('Content-Type', 'application/json');
     echo _json_encode($output);
+}
 
+function unmute_alert() {
+    global $config;
+    $app      = \Slim\Slim::getInstance();
+    $router   = $app->router()->getCurrentRoute()->getParams();
+    $alert_id = mres($router['id']);
+    $status   = 'error';
+    $err_msg  = '';
+    $message  = '';
+    $code     = 500;
+    if (is_numeric($alert_id)) {
+        $status = 'ok';
+        $code   = 200;
+        if (dbUpdate(array('state' => 1), 'alerts', '`id` = ? LIMIT 1', array($alert_id))) {
+            $message = 'Alert has been unmuted';
+        }
+        else {
+            $message = 'No alert by that ID';
+        }
+    }
+    else {
+        $err_msg = 'Invalid alert has been provided';
+    }
+
+    $output = array(
+        'status'  => $status,
+        'err-msg' => $err_msg,
+        'message' => $message,
+    );
+    $app->response->setStatus($code);
+    $app->response->headers->set('Content-Type', 'application/json');
+    echo _json_encode($output);
 }