diff --git a/src/frontends/qt4/QBox.C b/src/frontends/qt4/QBox.C
index 64db6c3f38..262900d306 100644
--- a/src/frontends/qt4/QBox.C
+++ b/src/frontends/qt4/QBox.C
@@ -265,7 +265,7 @@ void QBox::setSpecial(bool ibox)
 	} else if (ibox && has_special) {
 		dialog_->widthUnitsLC->clear();
 		for (int i = 0; i < num_units; i++)
-			dialog_->widthUnitsLC->addItem(unit_name_gui[i]);
+			dialog_->widthUnitsLC->addItem(qt_(unit_name_gui[i]));
 	}
 }
 
diff --git a/src/frontends/qt4/QExternal.C b/src/frontends/qt4/QExternal.C
index 3df1956375..48e01e8be3 100644
--- a/src/frontends/qt4/QExternal.C
+++ b/src/frontends/qt4/QExternal.C
@@ -338,7 +338,7 @@ void QExternal::build_dialog()
 	// Fill the width combo
 	dialog_->widthUnitCO->addItem(qt_("Scale%"));
 	for (int i = 0; i < num_units; i++)
-		dialog_->widthUnitCO->addItem(unit_name_gui[i]);
+		dialog_->widthUnitCO->addItem(qt_(unit_name_gui[i]));
 }
 
 
diff --git a/src/frontends/qt4/lengthcombo.C b/src/frontends/qt4/lengthcombo.C
index d4e85931c6..030c63e166 100644
--- a/src/frontends/qt4/lengthcombo.C
+++ b/src/frontends/qt4/lengthcombo.C
@@ -12,15 +12,15 @@
 #include <config.h>
 
 #include "lengthcombo.h"
-
 #include "lengthcommon.h"
+#include "qt_helpers.h"
 
 
 LengthCombo::LengthCombo(QWidget * parent)
 	: QComboBox(parent)
 {
 	for (int i = 0; i < lyx::num_units; i++)
-		addItem(lyx::unit_name_gui[i]);
+		addItem(lyx::qt_(lyx::unit_name_gui[i]));
 
 	connect(this, SIGNAL(activated(int)),
 		this, SLOT(has_activated(int)));