diff --git a/src/modules/partition/gui/ResizeVolumeGroupDialog.cpp b/src/modules/partition/gui/ResizeVolumeGroupDialog.cpp
index 1c5eef0ab..2de999360 100644
--- a/src/modules/partition/gui/ResizeVolumeGroupDialog.cpp
+++ b/src/modules/partition/gui/ResizeVolumeGroupDialog.cpp
@@ -44,7 +44,7 @@ ResizeVolumeGroupDialog::ResizeVolumeGroupDialog( LvmDevice *device,
     for ( const Partition* p : availablePVs )
         pvList()->addItem( new ListPhysicalVolumeWidgetItem( p, false ) );
 
-    peSize()->setValue( device->peSize() / Capacity::unitFactor(Capacity::Unit::Byte, Capacity::Unit::MiB) );
+    peSize()->setValue( static_cast<int>( device->peSize() / Capacity::unitFactor(Capacity::Unit::Byte, Capacity::Unit::MiB) ) );
 
     vgName()->setEnabled( false );
     peSize()->setEnabled( false );
diff --git a/src/modules/partition/gui/VolumeGroupBaseDialog.cpp b/src/modules/partition/gui/VolumeGroupBaseDialog.cpp
index a727fe42a..8078253b3 100644
--- a/src/modules/partition/gui/VolumeGroupBaseDialog.cpp
+++ b/src/modules/partition/gui/VolumeGroupBaseDialog.cpp
@@ -137,9 +137,9 @@ VolumeGroupBaseDialog::updateTotalSize()
 void
 VolumeGroupBaseDialog::updateTotalSectors()
 {
-    qint32 totalSectors = 0;
+    qint64 totalSectors = 0;
 
-    qint32 extentSize = ui->peSize->value() * Capacity::unitFactor(Capacity::Unit::Byte, Capacity::Unit::MiB);
+    qint64 extentSize = ui->peSize->value() * Capacity::unitFactor(Capacity::Unit::Byte, Capacity::Unit::MiB);
 
     if ( extentSize > 0 )
         totalSectors = m_totalSizeValue / extentSize;