diff --git a/Userland/Libraries/LibWeb/IntersectionObserver/IntersectionObserver.cpp b/Userland/Libraries/LibWeb/IntersectionObserver/IntersectionObserver.cpp
index f9a9c7361c..cc0c6fb8cb 100644
--- a/Userland/Libraries/LibWeb/IntersectionObserver/IntersectionObserver.cpp
+++ b/Userland/Libraries/LibWeb/IntersectionObserver/IntersectionObserver.cpp
@@ -53,17 +53,17 @@ IntersectionObserver::IntersectionObserver(JS::Realm& realm, JS::GCPtr<WebIDL::C
     , m_thresholds(move(thresholds))
 {
     intersection_root().visit([this](auto& node) {
-        node->document().register_intersection_observer({}, *this);
+        m_document = node->document();
     });
+    m_document->register_intersection_observer({}, *this);
 }
 
 IntersectionObserver::~IntersectionObserver() = default;
 
 void IntersectionObserver::finalize()
 {
-    intersection_root().visit([this](auto& node) {
-        node->document().unregister_intersection_observer({}, *this);
-    });
+    if (m_document)
+        m_document->unregister_intersection_observer({}, *this);
 }
 
 void IntersectionObserver::initialize(JS::Realm& realm)
diff --git a/Userland/Libraries/LibWeb/IntersectionObserver/IntersectionObserver.h b/Userland/Libraries/LibWeb/IntersectionObserver/IntersectionObserver.h
index 83fbee91c0..a8ce7b333f 100644
--- a/Userland/Libraries/LibWeb/IntersectionObserver/IntersectionObserver.h
+++ b/Userland/Libraries/LibWeb/IntersectionObserver/IntersectionObserver.h
@@ -83,6 +83,9 @@ private:
 
     // https://www.w3.org/TR/intersection-observer/#dom-intersectionobserver-observationtargets-slot
     Vector<JS::NonnullGCPtr<DOM::Element>> m_observation_targets;
+
+    // AD-HOC: This is the document where we've registered the IntersectionObserver.
+    WeakPtr<DOM::Document> m_document;
 };
 
 }