--- a/content/base/public/Element.h
+++ b/content/base/public/Element.h
@@ -669,16 +669,20 @@ public:
   }
   void SetPointerCapture(int32_t aPointerId, ErrorResult& aError)
   {
     bool activeState = false;
     if (!nsIPresShell::GetPointerInfo(aPointerId, activeState)) {
       aError.Throw(NS_ERROR_DOM_INVALID_POINTER_ERR);
       return;
     }
+    if (!IsInDoc()) {
+      aError.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+      return;
+    }
     if (!activeState) {
       return;
     }
     nsIPresShell::SetPointerCapturingContent(aPointerId, this);
   }
   void ReleasePointerCapture(int32_t aPointerId, ErrorResult& aError)
   {
     bool activeState = false;