diff --git a/src/backend/schedulable_list.hh b/src/backend/schedulable_list.hh
index d56fc1e..fa5e6a8 100644
--- a/src/backend/schedulable_list.hh
+++ b/src/backend/schedulable_list.hh
@@ -30,16 +30,16 @@
 
 
 namespace sgpem
-{	
+{
     class SchedulableList;
-	
+
     class SG_DLLEXPORT SchedulableList
     {
     public:
 	SchedulableList();
 	bool 							operator==(const SchedulableList&) const;
 	bool 							has_same_objects(const SchedulableList& dx) const;
-				
+
 	sgpem::SchedulableStatus* 		top();
 	sgpem::SchedulableStatus* 		bottom();
 	void 							add_at_bottom(const sgpem::SchedulableStatus&);
@@ -54,7 +54,7 @@ namespace sgpem
 	/** \brief This method swaps the element at positionA with
 	 * the one at positionB.
 	 *
-	 * At the present moment, this function shouldn't throw any 
+	 * At the present moment, this function shouldn't throw any
 	 * exception, but just do nothing when the parameters don't
 	 * make sense (e.g. positionB > this.size()).
 	 * However, it should work the same either if positionA is greater
@@ -64,12 +64,12 @@ namespace sgpem
 	 * \param positionA The position of the first element to swap
 	 * \param positionB The position of the second element to swap
 	 */
-	void swap(unsigned int positionA, unsigned int positionB) throw() {}
+	void swap(unsigned int positionA, unsigned int positionB) throw();
 
     private:
 	std::list<SchedulableStatus>  _list;
     };
-	
+
 }//~ namespace sgpem
 
 #endif //SCHEDULABLE_LIST_HH