diff --git a/GUI/Models/RectangularDetectorItem.cpp b/GUI/Models/RectangularDetectorItem.cpp
index f665db744341f1233c862ed349d7667430b1db80..ee5b61ee23922497a5faea40ae3af07edfbd990c 100644
--- a/GUI/Models/RectangularDetectorItem.cpp
+++ b/GUI/Models/RectangularDetectorItem.cpp
@@ -259,6 +259,16 @@ void RectangularDetectorItem::setDirectBeamV0(const double v0)
     setItemValue(P_DBEAM_V0, v0);
 }
 
+SessionItem* RectangularDetectorItem::distanceItem() const
+{
+    return getItem(P_DISTANCE);
+}
+
+void RectangularDetectorItem::setDistance(const double distance)
+{
+    setItemValue(P_DISTANCE, distance);
+}
+
 std::unique_ptr<IDetector2D> RectangularDetectorItem::createDomainDetector() const
 {
     // basic axes parameters
diff --git a/GUI/Models/RectangularDetectorItem.h b/GUI/Models/RectangularDetectorItem.h
index 955cbf3f1b83e169650a9130f1d7a0d1f93d9e83..85289bc2e5d3d9d2712b64194f242a75df1cf884 100644
--- a/GUI/Models/RectangularDetectorItem.h
+++ b/GUI/Models/RectangularDetectorItem.h
@@ -32,10 +32,9 @@ private:
     static const QString P_V0;
     static const QString P_DBEAM_U0;
     static const QString P_DBEAM_V0;
-
-public:
     static const QString P_DISTANCE;
 
+public:
     RectangularDetectorItem();
 
     void setDetectorAlignment(const QString& alignment);
@@ -73,6 +72,9 @@ public:
     SessionItem* directBeamV0Item() const;
     void setDirectBeamV0(double dbeam_v0);
 
+    SessionItem* distanceItem() const;
+    void setDistance(double distance);
+
 private:
     std::unique_ptr<IDetector2D> createDomainDetector() const override;
     void update_properties_appearance();
diff --git a/GUI/Models/TransformFromDomain.cpp b/GUI/Models/TransformFromDomain.cpp
index 69e12eb6d12951ca9fe7bb9b3498b28155bc9c19..7d1674d946220c9e3d68d4db28a02151ffd58f68 100644
--- a/GUI/Models/TransformFromDomain.cpp
+++ b/GUI/Models/TransformFromDomain.cpp
@@ -400,28 +400,28 @@ void TransformFromDomain::setRectangularDetector(RectangularDetectorItem* detect
 
     else if (detector.getDetectorArrangment() == RectangularDetector::PERPENDICULAR_TO_SAMPLE) {
         detector_item->setDetectorAlignment("Perpendicular to sample x-axis");
-        detector_item->setItemValue(RectangularDetectorItem::P_DISTANCE, detector.getDistance());
+        detector_item->setDistance(detector.getDistance());
         detector_item->setU0(detector.getU0());
         detector_item->setV0(detector.getV0());
 
     } else if (detector.getDetectorArrangment()
                == RectangularDetector::PERPENDICULAR_TO_DIRECT_BEAM) {
         detector_item->setDetectorAlignment("Perpendicular to direct beam");
-        detector_item->setItemValue(RectangularDetectorItem::P_DISTANCE, detector.getDistance());
+        detector_item->setDistance(detector.getDistance());
         detector_item->setDirectBeamU0(detector.getU0());
         detector_item->setDirectBeamV0(detector.getV0());
 
     } else if (detector.getDetectorArrangment()
                == RectangularDetector::PERPENDICULAR_TO_REFLECTED_BEAM) {
         detector_item->setDetectorAlignment("Perpendicular to reflected beam");
-        detector_item->setItemValue(RectangularDetectorItem::P_DISTANCE, detector.getDistance());
+        detector_item->setDistance(detector.getDistance());
         detector_item->setU0(detector.getU0());
         detector_item->setV0(detector.getV0());
 
     } else if (detector.getDetectorArrangment()
                == RectangularDetector::PERPENDICULAR_TO_REFLECTED_BEAM_DPOS) {
         detector_item->setDetectorAlignment("Perpendicular to reflected beam (dpos)");
-        detector_item->setItemValue(RectangularDetectorItem::P_DISTANCE, detector.getDistance());
+        detector_item->setDistance(detector.getDistance());
         detector_item->setDirectBeamU0(detector.getDirectBeamU0());
         detector_item->setDirectBeamV0(detector.getDirectBeamV0());
 
diff --git a/GUI/Views/InstrumentWidgets/RectangularDetectorEditor.cpp b/GUI/Views/InstrumentWidgets/RectangularDetectorEditor.cpp
index 41360726e601f8c41bca87ac27a1e877a989ef43..c2eec10c031bc546d6b965250a4f5f91da60b2bf 100644
--- a/GUI/Views/InstrumentWidgets/RectangularDetectorEditor.cpp
+++ b/GUI/Views/InstrumentWidgets/RectangularDetectorEditor.cpp
@@ -149,7 +149,7 @@ void RectangularDetectorEditor::init_alignment_editors()
         m_positionsEditor->show();
         m_positionsEditor->addItem(detectorItem()->directBeamU0Item());
         m_positionsEditor->addItem(detectorItem()->directBeamV0Item());
-        m_positionsEditor->addItem(detectorItem()->getItem(RectangularDetectorItem::P_DISTANCE));
+        m_positionsEditor->addItem(detectorItem()->distanceItem());
 
     } else if (alignment.getValue() == "Perpendicular to sample x-axis"
                || alignment.getValue() == "Perpendicular to reflected beam") {
@@ -157,6 +157,6 @@ void RectangularDetectorEditor::init_alignment_editors()
 
         m_positionsEditor->addItem(detectorItem()->u0Item());
         m_positionsEditor->addItem(detectorItem()->v0Item());
-        m_positionsEditor->addItem(detectorItem()->getItem(RectangularDetectorItem::P_DISTANCE));
+        m_positionsEditor->addItem(detectorItem()->distanceItem());
     }
 }