diff --git a/Libraries/LibWeb/DOM/Node.h b/Libraries/LibWeb/DOM/Node.h
index af9e8730b54..a83bbef4838 100644
--- a/Libraries/LibWeb/DOM/Node.h
+++ b/Libraries/LibWeb/DOM/Node.h
@@ -63,6 +63,7 @@ enum class ShouldComputeRole {
     X(EditingInsertion)                             \
     X(ElementAttributeChange)                       \
     X(ElementSetShadowRoot)                         \
+    X(HTMLDialogElementSetIsModal)                  \
     X(HTMLHyperlinkElementHrefChange)               \
     X(HTMLIFrameElementGeometryChange)              \
     X(HTMLInputElementSetChecked)                   \
diff --git a/Libraries/LibWeb/HTML/HTMLDialogElement.cpp b/Libraries/LibWeb/HTML/HTMLDialogElement.cpp
index 810430b0c46..d49e1704204 100644
--- a/Libraries/LibWeb/HTML/HTMLDialogElement.cpp
+++ b/Libraries/LibWeb/HTML/HTMLDialogElement.cpp
@@ -467,7 +467,7 @@ void HTMLDialogElement::set_is_modal(bool is_modal)
     if (m_is_modal == is_modal)
         return;
     m_is_modal = is_modal;
-    invalidate_style(DOM::StyleInvalidationReason::NodeRemove);
+    invalidate_style(DOM::StyleInvalidationReason::HTMLDialogElementSetIsModal);
 }
 
 // https://html.spec.whatwg.org/multipage/interactive-elements.html#the-dialog-element:is-valid-invoker-command-steps