diff --git a/src/fs/luks.cpp b/src/fs/luks.cpp
index d748b52..35234d0 100644
--- a/src/fs/luks.cpp
+++ b/src/fs/luks.cpp
@@ -484,7 +484,9 @@ bool luks::resize(Report& report, const QString& deviceNode, qint64 newLength) c
     }
     else if (m_innerFs->resize(report, mapperNode, payloadLength))
     {
-        ExternalCommand cryptResizeCmd(report, QStringLiteral("cryptsetup"), { QStringLiteral("--size"), QString::number(payloadLength / m_logicalSectorSize), QStringLiteral("resize"), mapperNode });
+        ExternalCommand cryptResizeCmd(report, QStringLiteral("cryptsetup"), 
+                {  QStringLiteral("--size"), QString::number(payloadLength / /*m_logicalSectorSize*/ 512), // LUKS assume 512 bytes sector
+                   QStringLiteral("resize"), mapperNode });
         report.line() << xi18nc("@info:progress", "Resizing LUKS crypt on partition <filename>%1</filename>.", deviceNode);
         if (cryptResizeCmd.run(-1) && cryptResizeCmd.exitCode() == 0)
         {