diff --git a/system/src/Grav/Common/Assets.php b/system/src/Grav/Common/Assets.php
index 57830fb95..a63a08d3d 100644
--- a/system/src/Grav/Common/Assets.php
+++ b/system/src/Grav/Common/Assets.php
@@ -244,7 +244,7 @@ class Assets
         }
 
         $key = md5($asset);
-        if ($asset && !array_key_exists($key, $this->css)) {
+        if ($asset) {
             $this->css[$key] = [
                 'asset'    => $asset,
                 'priority' => $priority,
@@ -286,7 +286,7 @@ class Assets
         }
 
         $key = md5($asset);
-        if ($asset && !array_key_exists($key, $this->js)) {
+        if ($asset) {
             $this->js[$key] = [
                 'asset'    => $asset,
                 'priority' => $priority,