diff --git a/Libraries/LibWeb/HTML/BrowsingContext.cpp b/Libraries/LibWeb/HTML/BrowsingContext.cpp
index 9a8e88d0412..8da81080934 100644
--- a/Libraries/LibWeb/HTML/BrowsingContext.cpp
+++ b/Libraries/LibWeb/HTML/BrowsingContext.cpp
@@ -60,7 +60,7 @@ bool url_matches_about_srcdoc(URL::URL const& url)
 }
 
 // https://html.spec.whatwg.org/multipage/document-sequences.html#determining-the-origin
-URL::Origin determine_the_origin(Optional<URL::URL> const& url, SandboxingFlagSet sandbox_flags, Optional<URL::Origin> source_origin)
+URL::Origin determine_the_origin(Optional<URL::URL const&> url, SandboxingFlagSet sandbox_flags, Optional<URL::Origin> source_origin)
 {
     // 1. If sandboxFlags has its sandboxed origin browsing context flag set, then return a new opaque origin.
     if (has_flag(sandbox_flags, SandboxingFlagSet::SandboxedOrigin)) {
diff --git a/Libraries/LibWeb/HTML/BrowsingContext.h b/Libraries/LibWeb/HTML/BrowsingContext.h
index 368db1b6aac..46953abe63a 100644
--- a/Libraries/LibWeb/HTML/BrowsingContext.h
+++ b/Libraries/LibWeb/HTML/BrowsingContext.h
@@ -169,7 +169,7 @@ private:
     GC::Ptr<BrowsingContext> m_previous_sibling;
 };
 
-URL::Origin determine_the_origin(Optional<URL::URL> const&, SandboxingFlagSet, Optional<URL::Origin> source_origin);
+URL::Origin determine_the_origin(Optional<URL::URL const&>, SandboxingFlagSet, Optional<URL::Origin> source_origin);
 
 SandboxingFlagSet determine_the_creation_sandboxing_flags(BrowsingContext const&, GC::Ptr<DOM::Element> embedder);