diff --git a/Libraries/LibWeb/HTML/HTMLLinkElement.cpp b/Libraries/LibWeb/HTML/HTMLLinkElement.cpp
index a7d9097e47e..3085ff9fbd3 100644
--- a/Libraries/LibWeb/HTML/HTMLLinkElement.cpp
+++ b/Libraries/LibWeb/HTML/HTMLLinkElement.cpp
@@ -426,7 +426,7 @@ void HTMLLinkElement::process_stylesheet_resource(bool success, Fetch::Infrastru
             mime_type_string = extracted_mime_type->essence();
     }
 
-    if (mime_type_string != "text/css"sv) {
+    if (mime_type_string.has_value() && mime_type_string != "text/css"sv) {
         success = false;
     }