diff --git a/src/modules/partition/PartitionModel.cpp b/src/modules/partition/PartitionModel.cpp
index 461f2e2c5..e1c9aaa70 100644
--- a/src/modules/partition/PartitionModel.cpp
+++ b/src/modules/partition/PartitionModel.cpp
@@ -174,6 +174,8 @@ PartitionModel::data( const QModelIndex& index, int role ) const
             return QVariant();
     case SizeRole:
         return ( partition->lastSector() - partition->firstSector() + 1 ) * m_device->logicalSectorSize();
+    case IsFreeSpaceRole:
+        return PMUtils::isPartitionFreeSpace( partition );
     default:
         return QVariant();
     }
diff --git a/src/modules/partition/PartitionModel.h b/src/modules/partition/PartitionModel.h
index 96bb3db4e..9345dbdeb 100644
--- a/src/modules/partition/PartitionModel.h
+++ b/src/modules/partition/PartitionModel.h
@@ -50,7 +50,8 @@ public:
     {
         // The raw size, as a qlonglong. This is different from the DisplayRole of
         // SizeColumn, which is a human-readable string.
-        SizeRole = Qt::UserRole + 1
+        SizeRole = Qt::UserRole + 1,
+        IsFreeSpaceRole
     };
 
     enum Column