diff --git a/src/insets/InsetRef.cpp b/src/insets/InsetRef.cpp
index afc123ee77..3683905a1b 100644
--- a/src/insets/InsetRef.cpp
+++ b/src/insets/InsetRef.cpp
@@ -25,6 +25,7 @@
 #include "support/docstream.h"
 #include "support/gettext.h"
 #include "support/lstrings.h"
+#include "support/FileName.h"
 
 using namespace lyx::support;
 using namespace std;
@@ -142,9 +143,19 @@ void InsetRef::updateLabels(ParIterator const & it)
 }
 
 
+/** \note
+ ** If inset belongs to an Embedded WorkArea's Buffer, ref is likely
+ ** to point to some documentBuffer's label.  Don't know how to
+ ** retrieve the corresponding documentBuffer (so as to check if the
+ ** label exists or not), so the "BROKEN:" indication is disabled in
+ ** Embedded WorkArea(s).
+ **/
 void InsetRef::addToToc(DocIterator const & cpit)
 {
 	docstring const & label = getParam("reference");
+	if (buffer().fileName().extension() == "internal")
+		return;
+
 	if (buffer().insetLabel(label))
 		// This InsetRef has already been taken care of in InsetLabel::addToToc().
 		return;