1 files changed, 5 insertions, 0 deletions
diff --git a/chromium/third_party/blink/renderer/core/html/html_frame_set_element.cc b/chromium/third_party/blink/renderer/core/html/html_frame_set_element.cc
index 3a3503d4fbb..31597f36100 100644
--- a/chromium/third_party/blink/renderer/core/html/html_frame_set_element.cc
+++ b/chromium/third_party/blink/renderer/core/html/html_frame_set_element.cc
@@ -205,6 +205,11 @@ void HTMLFrameSetElement::ParseAttribute(
     GetDocument().SetWindowAttributeEventListener(
         event_type_names::kLanguagechange,
         CreateAttributeEventListener(GetDocument().GetFrame(), name, value));
+  } else if (RuntimeEnabledFeatures::PortalsEnabled() &&
+             name == kOnportalactivateAttr) {
+    GetDocument().SetWindowAttributeEventListener(
+        event_type_names::kPortalactivate,
+        CreateAttributeEventListener(GetDocument().GetFrame(), name, value));
   } else {
     HTMLElement::ParseAttribute(params);
   }