diff --git a/src/ops/operation.cpp b/src/ops/operation.cpp
index c837f29..d575fb9 100644
--- a/src/ops/operation.cpp
+++ b/src/ops/operation.cpp
@@ -20,6 +20,7 @@
 
 #include "core/partition.h"
 #include "core/device.h"
+#include "core/lvmdevice.h"
 
 #include "jobs/job.h"
 
@@ -51,6 +52,10 @@ void Operation::insertPreviewPartition(Device& device, Partition& p)
     device.partitionTable()->removeUnallocated();
 
     p.parent()->insert(&p);
+    if (device.type() == Device::Type::LVM_Device) {
+        const LvmDevice& lvm = static_cast<const LvmDevice&>(device);
+        lvm.setFreePE(lvm.freePE() - p.length());
+    }
 
     device.partitionTable()->updateUnallocated(device);
 }
@@ -59,8 +64,14 @@ void Operation::removePreviewPartition(Device& device, Partition& p)
 {
     Q_ASSERT(device.partitionTable());
 
-    if (p.parent()->remove(&p))
+    if (p.parent()->remove(&p)) {
+        if (device.type() == Device::Type::LVM_Device) {
+            const LvmDevice& lvm = static_cast<const LvmDevice&>(device);
+            lvm.setFreePE(lvm.freePE() + p.length());
+        }
+
         device.partitionTable()->updateUnallocated(device);
+    }
     else
         qWarning() << "failed to remove partition " << p.deviceNode() << " at " << &p << " from preview.";
 }
diff --git a/src/ops/resizeoperation.cpp b/src/ops/resizeoperation.cpp
index fee9207..3527a96 100644
--- a/src/ops/resizeoperation.cpp
+++ b/src/ops/resizeoperation.cpp
@@ -121,11 +121,6 @@ bool ResizeOperation::targets(const Partition& p) const
 
 void ResizeOperation::preview()
 {
-    if (targetDevice().type() == Device::Type::LVM_Device) {
-        const LvmDevice& lvm = static_cast<const LvmDevice&>(targetDevice());
-        lvm.setFreePE(lvm.freePE() + partition().lastSector() - newLastSector());
-    }
-
     // If the operation has already been executed, the partition will of course have newFirstSector and
     // newLastSector as first and last sector. But to remove it from its original position, we need to
     // temporarily set these values back to where they were before the operation was executed.
@@ -144,11 +139,6 @@ void ResizeOperation::preview()
 
 void ResizeOperation::undo()
 {
-    if (targetDevice().type() == Device::Type::LVM_Device) {
-        const LvmDevice& lvm = static_cast<const LvmDevice&>(targetDevice());
-        lvm.setFreePE(lvm.freePE() - origLastSector() + partition().lastSector());
-    }
-
     removePreviewPartition(targetDevice(), partition());
     partition().setFirstSector(origFirstSector());
     partition().setLastSector(origLastSector());