diff --git a/src/core/partitiontable.cpp b/src/core/partitiontable.cpp
index 23c62e7..f871d07 100644
--- a/src/core/partitiontable.cpp
+++ b/src/core/partitiontable.cpp
@@ -89,6 +89,17 @@ qint64 PartitionTable::freeSectorsAfter(const Partition& p) const
     return 0;
 }
 
+qint64 PartitionTable::freeSectors() const
+{
+    qint64 sectors = 0;
+    foreach(const Partition * p, children())
+    if (p->roles().has(PartitionRole::Unallocated)) {
+        sectors += p->length();
+    }
+
+    return sectors;
+}
+
 /** @return true if the PartitionTable has an extended Partition */
 bool PartitionTable::hasExtended() const
 {
diff --git a/src/core/partitiontable.h b/src/core/partitiontable.h
index aebc15b..eb83c5c 100644
--- a/src/core/partitiontable.h
+++ b/src/core/partitiontable.h
@@ -126,6 +126,7 @@ public:
 
     qint64 freeSectorsBefore(const Partition& p) const;
     qint64 freeSectorsAfter(const Partition& p) const;
+    qint64 freeSectors() const;
 
     bool hasExtended() const;
     Partition* extended() const;
diff --git a/src/gui/partresizerwidget.cpp b/src/gui/partresizerwidget.cpp
index e7efc60..564f93d 100644
--- a/src/gui/partresizerwidget.cpp
+++ b/src/gui/partresizerwidget.cpp
@@ -135,6 +135,7 @@ qint32 PartResizerWidget::handleWidth() const
 
 qint64 PartResizerWidget::sectorsPerPixel() const
 {
+    //FIXME: Make sure that this function never return 0
     return totalSectors() / (width() - 2 * handleWidth());
 }