diff --git a/include/sot/core/derivator.hh b/include/sot/core/derivator.hh
index 5ad3c3c06345eb551cf4196d386b8291c8f57945..5ed8ba6011b59872de8cf5df1f7b4570a19e9c63 100644
--- a/include/sot/core/derivator.hh
+++ b/include/sot/core/derivator.hh
@@ -47,11 +47,10 @@ namespace dg = dynamicgraph;
 /* --------------------------------------------------------------------- */
 
 template< class T >
-class Derivator
-:public dg::Entity
+class Derivator : public dg::Entity
 {
   DYNAMIC_GRAPH_ENTITY_DECL();
- protected:
+protected:
   T memory;
   bool initialized;
   double timestep;
@@ -61,7 +60,6 @@ class Derivator
 
   static std::string getTypeName( void ) { return "Unknown"; }
 
-
   Derivator( const std::string& name )
     : dg::Entity(name)
     ,memory(),initialized(false)
diff --git a/include/sot/core/gripper-control.hh b/include/sot/core/gripper-control.hh
index 93fe0ba5c4eb366e3458a1781ef64a097206abdc..758d8fbe804496d58f269b1da68d724415df85fa 100644
--- a/include/sot/core/gripper-control.hh
+++ b/include/sot/core/gripper-control.hh
@@ -61,6 +61,7 @@ namespace dg = dynamicgraph;
 
 class SOTGRIPPERCONTROL_EXPORT GripperControl
 {
+  DYNAMIC_GRAPH_ENTITY_DECL();
  protected:
 
   double offset;
diff --git a/include/sot/core/reader.hh b/include/sot/core/reader.hh
index 5ee2e4fddd4ada5d214bfc57659d61eace748f5e..b0a6eb280b1494694ca113b7f919231dbd230195 100644
--- a/include/sot/core/reader.hh
+++ b/include/sot/core/reader.hh
@@ -71,7 +71,6 @@ class SOTREADER_EXPORT sotReader
 : public Entity
 {
   DYNAMIC_GRAPH_ENTITY_DECL();
-
  public: 
 
   SignalPtr< Flags,int > selectionSIN;
diff --git a/include/sot/core/sequencer.hh b/include/sot/core/sequencer.hh
index a17804530d2873420f68f34ccb866e4df1467990..f935c218bf7f28f453556c81d43de0284c877439 100644
--- a/include/sot/core/sequencer.hh
+++ b/include/sot/core/sequencer.hh
@@ -66,7 +66,6 @@ namespace dynamicgraph {
       :public dynamicgraph::Entity
       {
 	DYNAMIC_GRAPH_ENTITY_DECL();
-
       public:
 	class sotEventAbstract
 	{