diff --git a/src/Gui/DlgParameterImp.h b/src/Gui/DlgParameterImp.h
index 18432852de..9f4fd8e1df 100644
--- a/src/Gui/DlgParameterImp.h
+++ b/src/Gui/DlgParameterImp.h
@@ -28,6 +28,7 @@
 
 #include <QTreeWidgetItem>
 #include <QTreeWidget>
+#include <QDialog>
 
 namespace Gui {
 namespace Dialog {
diff --git a/src/Gui/ManualAlignment.cpp b/src/Gui/ManualAlignment.cpp
index 78eeb930d0..31d1289b50 100644
--- a/src/Gui/ManualAlignment.cpp
+++ b/src/Gui/ManualAlignment.cpp
@@ -304,7 +304,7 @@ const MovableGroup& MovableGroupModel::activeGroup() const
     // Make sure that the array is not empty
     if (this->_groups.empty())
         throw Base::RuntimeError("Empty group");
-    return *(this->_groups.begin());
+    return this->_groups.front();
 }
 
 void MovableGroupModel::continueAlignment()
@@ -328,6 +328,13 @@ int MovableGroupModel::count() const
     return this->_groups.size();
 }
 
+const MovableGroup& MovableGroupModel::getGroup(int i) const
+{
+    if (i >= count())
+        throw Base::IndexError("Index out of range");
+    return this->_groups[i];
+}
+
 // ------------------------------------------------------------------
 
 namespace Gui {
diff --git a/src/Gui/ManualAlignment.h b/src/Gui/ManualAlignment.h
index ebfdc58713..7b00b17d47 100644
--- a/src/Gui/ManualAlignment.h
+++ b/src/Gui/ManualAlignment.h
@@ -169,6 +169,7 @@ public:
     void clear();
     bool isEmpty() const;
     int count() const;
+    const MovableGroup& getGroup(int i) const;
 
 protected:
     void removeActiveGroup();