diff --git a/mod/lti/locallib.php b/mod/lti/locallib.php
index 64aee18a813..c89988721b3 100644
--- a/mod/lti/locallib.php
+++ b/mod/lti/locallib.php
@@ -3020,6 +3020,15 @@ function lti_load_type_from_cartridge($url, $type) {
     }
     unset($toolinfo['lti_extension_secureicon']);
 
+    // Ensure Custom icons aren't overridden by cartridge params.
+    if (!empty($type->lti_icon)) {
+        unset($toolinfo['lti_icon']);
+    }
+
+    if (!empty($type->lti_secureicon)) {
+        unset($toolinfo['lti_secureicon']);
+    }
+
     foreach ($toolinfo as $property => $value) {
         $type->$property = $value;
     }