diff --git a/src/plugins/sfdisk/sfdiskpartitiontable.cpp b/src/plugins/sfdisk/sfdiskpartitiontable.cpp
index 07f0686..1db421d 100644
--- a/src/plugins/sfdisk/sfdiskpartitiontable.cpp
+++ b/src/plugins/sfdisk/sfdiskpartitiontable.cpp
@@ -202,8 +202,11 @@ static QLatin1String getPartitionType(FileSystem::Type t, PartitionTable::TableT
 
 bool SfdiskPartitionTable::setPartitionSystemType(Report& report, const Partition& partition)
 {
+    QString partitionType = getPartitionType(partition.fileSystem().type(), m_device->partitionTable()->type());
+    if (partitionType.isEmpty())
+        return true;
     ExternalCommand sfdiskCommand(report, QStringLiteral("sfdisk"), { QStringLiteral("--part-type"), m_device->deviceNode(), QString::number(partition.number()),
-                getPartitionType(partition.fileSystem().type(), m_device->partitionTable()->type()) } );
+                partitionType } );
     return sfdiskCommand.run(-1) && sfdiskCommand.exitCode() == 0;
 }