diff --git a/src/Gui/Widgets.cpp b/src/Gui/Widgets.cpp
index 3016b24e04a5..9e3e3a7c67f8 100644
--- a/src/Gui/Widgets.cpp
+++ b/src/Gui/Widgets.cpp
@@ -1197,6 +1197,8 @@ LabelEditor::LabelEditor (QWidget * parent)
 
     connect(lineEdit, SIGNAL(textChanged(const QString &)),
             this, SIGNAL(textChanged(const QString &)));
+    connect(lineEdit, SIGNAL(textChanged(const QString &)),
+            this, SLOT(validateText(const QString &)));
 
     button = new QPushButton(QLatin1String("..."), this);
     button->setFixedWidth(2*button->fontMetrics().width(QLatin1String(" ... ")));
@@ -1250,6 +1252,15 @@ void LabelEditor::changeText()
     }
 }
 
+/**
+ * Validates if the input of the lineedit is a valid list.
+ */
+void LabelEditor::validateText(const QString& s)
+{
+    if ( s.startsWith(QString::fromUtf8("[")) && s.endsWith(QString::fromUtf8("]")) )
+        this->plainText = s.mid(1,s.size()-2).replace(QString::fromUtf8(","),QString::fromUtf8("\n"));
+}
+
 /**
  * Sets the browse button's text to \a txt.
  */
diff --git a/src/Gui/Widgets.h b/src/Gui/Widgets.h
index 097034a4e03e..7de00fbecaea 100644
--- a/src/Gui/Widgets.h
+++ b/src/Gui/Widgets.h
@@ -397,6 +397,7 @@ class GuiExport LabelEditor : public QWidget
 public Q_SLOTS:
     virtual void setText(const QString &);
     virtual void setButtonText (const QString &);
+    virtual void validateText (const QString &);
 
 Q_SIGNALS:
     void textChanged(const QString &);