diff --git a/src/gui/MixerChannelView.cpp b/src/gui/MixerChannelView.cpp
index 2a1fe09289e..aa3ce5f87b5 100644
--- a/src/gui/MixerChannelView.cpp
+++ b/src/gui/MixerChannelView.cpp
@@ -33,7 +33,6 @@
 #include "ConfigManager.h"
 
 #include "gui_templates.h"
-#include "lmms_math.h"
 
 #include <QGraphicsProxyWidget>
 #include <QGraphicsScene>
@@ -129,7 +128,8 @@ namespace lmms::gui
         m_effectRackView->setFixedWidth(EffectRackView::DEFAULT_WIDTH);
 
         auto mainLayout = new QVBoxLayout{this};
-        mainLayout->setContentsMargins(4, 4, 4, 4);
+        mainLayout->setContentsMargins(0, 0, 0, 0);
+        mainLayout->setSpacing(0);
         mainLayout->addWidget(m_receiveArrow, 0, Qt::AlignHCenter);
         mainLayout->addWidget(m_sendButton, 0, Qt::AlignHCenter);
         mainLayout->addWidget(m_sendKnob, 0, Qt::AlignHCenter);
@@ -492,4 +492,4 @@ namespace lmms::gui
         return Engine::mixer()->mixerChannel(m_channelIndex);
     }
 
-} // namespace lmms::gui
\ No newline at end of file
+} // namespace lmms::gui