diff --git a/src/frontends/qt4/CustomizedWidgets.cpp b/src/frontends/qt4/CustomizedWidgets.cpp
index a3a61bf8b9..d738ea281c 100644
--- a/src/frontends/qt4/CustomizedWidgets.cpp
+++ b/src/frontends/qt4/CustomizedWidgets.cpp
@@ -141,10 +141,11 @@ void ShortcutWidget::appendToSequence(QKeyEvent * e)
 {
 	KeySymbol sym;
 	setKeySymbol(&sym, e);
-
-	KeyModifier mod = lyx::q_key_state(e->modifiers());
 	
-	keysequence_.addkey(sym, mod, lyx::NoModifier);
+	if (sym.isOK()) {
+		KeyModifier mod = lyx::q_key_state(e->modifiers());
+		keysequence_.addkey(sym, mod, lyx::NoModifier);
+	}
 }
 
 
diff --git a/src/frontends/qt4/GuiKeySymbol.cpp b/src/frontends/qt4/GuiKeySymbol.cpp
index 082a184721..e82066403e 100644
--- a/src/frontends/qt4/GuiKeySymbol.cpp
+++ b/src/frontends/qt4/GuiKeySymbol.cpp
@@ -638,7 +638,7 @@ void KeySymbol::init(string const & symbolname)
 
 bool KeySymbol::isOK() const
 {
-	bool const ok = !(text_.empty() && key_ == Qt::Key_unknown);
+	bool const ok = !(text_.empty() && qkey_to_string(key_).empty());
 	LYXERR(Debug::KEY, "isOK is " << ok);
 	return ok;
 }
diff --git a/src/frontends/qt4/GuiWorkArea.cpp b/src/frontends/qt4/GuiWorkArea.cpp
index 76a8858a60..fba2c865db 100644
--- a/src/frontends/qt4/GuiWorkArea.cpp
+++ b/src/frontends/qt4/GuiWorkArea.cpp
@@ -854,8 +854,12 @@ void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
 
 	KeySymbol sym;
 	setKeySymbol(&sym, ev);
-	processKeySym(sym, q_key_state(ev->modifiers()));
-	ev->accept();
+	if (sym.isOK()) {
+		processKeySym(sym, q_key_state(ev->modifiers()));
+		ev->accept();
+	} else {
+		ev->ignore();
+	}
 }
 
 
diff --git a/status.16x b/status.16x
index f677303170..de9ecd1ff2 100644
--- a/status.16x
+++ b/status.16x
@@ -296,6 +296,8 @@ What's new
 - Re-allow the insertion of glue lengths in the VSpace dialog and the
   VSkip widget of the Document dialog (bug 6097).
 
+- Fix bug where multimedia keys were intercepted by LyX (bug 6043).
+
 
 * DOCUMENTATION AND LOCALIZATION