diff --git a/toolkit/tools/imagegen/attendedinstaller/views/diskview/manualpartitionwidget/manualpartitionwidget.go b/toolkit/tools/imagegen/attendedinstaller/views/diskview/manualpartitionwidget/manualpartitionwidget.go
index 334b50ab994..7cc4b300935 100644
--- a/toolkit/tools/imagegen/attendedinstaller/views/diskview/manualpartitionwidget/manualpartitionwidget.go
+++ b/toolkit/tools/imagegen/attendedinstaller/views/diskview/manualpartitionwidget/manualpartitionwidget.go
@@ -414,7 +414,8 @@ func (mp *ManualPartitionWidget) populateTable() (err error) {
 		mp.partitionTable.SetCell(tableHeaderRow, i, cell)
 	}
 
-	bootPartitionMountPoint, _, _, err := configuration.BootPartitionConfig(mp.bootType, mp.cfg.Disks[0].PartitionTableType)
+	// Hardcode to GPT only for now since all image configurations within Mariner are using GPT partition table type
+	bootPartitionMountPoint, _, _, err := configuration.BootPartitionConfig(mp.bootType, configuration.PartitionTableTypeGpt)
 	if err != nil {
 		return
 	}