diff --git a/GUI/View/Instrument/DistributionEditor.cpp b/GUI/View/Instrument/DistributionEditor.cpp
index 0673bb7833e7c80b578bb4afbb8f2712157204a0..9a56103ee971d1be07fe5f14150d76cec8d5dc12 100644
--- a/GUI/View/Instrument/DistributionEditor.cpp
+++ b/GUI/View/Instrument/DistributionEditor.cpp
@@ -165,7 +165,7 @@ DistributionEditor::DistributionEditor(const QString& title,
                                        BeamDistributionItem* item, bool allow_distr)
     : QGroupBox(title, parent)
 {
-    auto* hLayout = new QHBoxLayout(this);
+    auto* hLayout = new QVBoxLayout(this);
     m_selector = new DistributionSelector(mean_config, distributions, this, item, allow_distr);
     hLayout->addWidget(m_selector);
     hLayout->setSpacing(50);