diff --git a/accessible/src/base/nsRootAccessible.cpp b/accessible/src/base/nsRootAccessible.cpp
index 8ffd84b6a664..2baa82094b7c 100644
--- a/accessible/src/base/nsRootAccessible.cpp
+++ b/accessible/src/base/nsRootAccessible.cpp
@@ -847,8 +847,15 @@ nsresult nsRootAccessible::HandleEventWithTarget(nsIDOMEvent* aEvent,
         NS_ENSURE_TRUE(containerAccessible, NS_ERROR_FAILURE);
         // It is not top level menuitem
         // Only fire focus event if it is not inside collapsed popup
-        if (State(containerAccessible) & nsIAccessibleStates::STATE_COLLAPSED)
-          return NS_OK;
+        // and not a listitem of a combo box
+        if (State(containerAccessible) & nsIAccessibleStates::STATE_COLLAPSED) {
+          nsCOMPtr<nsIAccessible> containerParent;
+          containerAccessible->GetParent(getter_AddRefs(containerParent));
+          NS_ENSURE_TRUE(containerParent, NS_ERROR_FAILURE);
+          if (Role(containerParent) != nsIAccessibleRole::ROLE_COMBOBOX) {
+            return NS_OK;
+          }
+        }
       }
     }
     nsAccEvent::PrepareForEvent(aTargetNode, PR_TRUE);  // Always asynch, always from user input