diff --git a/code/template/helper/lazysizes.php b/code/template/helper/lazysizes.php
index 71c349cf..bd985fa3 100644
--- a/code/template/helper/lazysizes.php
+++ b/code/template/helper/lazysizes.php
@@ -36,12 +36,15 @@ public function import($plugin = '', $config = array())
 
 window.addEventListener('lazybeforesizes', function (e)
 {
-    //If 2g or saveData load lower quality image
-    if(navigator.connection.saveData === true) {
-        e.detail.width = Math.round(e.detail.width / 3);
-    //If 2g or saveData load lower quality image
-    } else if(navigator.connection.effectiveType.includes('2g')) {
-        e.detail.width = Math.round(e.detail.width / 2);
+    if ('connection' in navigator)
+    {
+        //If 2g or saveData load lower quality image
+        if(navigator.connection.saveData === true) {
+            e.detail.width = Math.round(e.detail.width / 3);
+        //If 2g or saveData load lower quality image
+        } else if(navigator.connection.effectiveType.includes('2g')) {
+            e.detail.width = Math.round(e.detail.width / 2);
+        }
     }
     
 });