diff -Naur btg-0.9.7.orig/external/plotmm/compat.h btg-0.9.7/external/plotmm/compat.h
--- btg-0.9.7.orig/external/plotmm/compat.h	2008-03-25 13:49:08.000000000 +0100
+++ btg-0.9.7/external/plotmm/compat.h	2008-03-25 14:21:18.000000000 +0100
@@ -59,7 +59,7 @@
 #else
 
 namespace PlotMM {
-  typedef SigC::ObjectBase ObjectBase;
+  typedef sigc::ObjectBase ObjectBase;
 }
 
 #endif
diff -Naur btg-0.9.7.orig/external/plotmm/curve.h btg-0.9.7/external/plotmm/curve.h
--- btg-0.9.7.orig/external/plotmm/curve.h	2008-03-25 13:49:08.000000000 +0100
+++ btg-0.9.7/external/plotmm/curve.h	2008-03-25 14:21:18.000000000 +0100
@@ -140,7 +140,7 @@
 			  int from = 0, int to = -1);
 
 	//! Signals that this curve has changed in some way or the other
-	SigC::Signal0<void> signal_curve_changed;
+	sigc::signal0<void> signal_curve_changed;
 
     protected:
 	virtual void init(const Glib::ustring &title);
diff -Naur btg-0.9.7.orig/external/plotmm/plot.cc btg-0.9.7/external/plotmm/plot.cc
--- btg-0.9.7.orig/external/plotmm/plot.cc	2008-03-25 13:49:08.000000000 +0100
+++ btg-0.9.7/external/plotmm/plot.cc	2008-03-25 14:21:18.000000000 +0100
@@ -322,7 +322,7 @@
       connect(sigc::mem_fun(*this,&Plot::on_canvas_expose_event));
 #else
     canvas_.signal_expose_event().
-      connect(SigC::slot(*this,&Plot::on_canvas_expose_event));
+      connect(sigc::slot(*this,&Plot::on_canvas_expose_event));
 #endif
 
     show_all();
@@ -406,19 +406,19 @@
 }
 
 //! Return the signal owned by plot canvas
-SigC::Signal3<void,int,int,GdkEventButton*> Plot::signal_plot_mouse_press()
+sigc::signal3<void,int,int,GdkEventButton*> Plot::signal_plot_mouse_press()
 {
     return canvas_.signal_plot_mouse_press;
 }
 
 //! Return the signal owned by plot canvas
-SigC::Signal3<void,int,int,GdkEventButton*> Plot::signal_plot_mouse_release()
+sigc::signal3<void,int,int,GdkEventButton*> Plot::signal_plot_mouse_release()
 {
     return canvas_.signal_plot_mouse_release;
 }
 
 //! Return the signal owned by plot canvas
-SigC::Signal3<void,int,int,GdkEventMotion*> Plot::signal_plot_mouse_move()
+sigc::signal3<void,int,int,GdkEventMotion*> Plot::signal_plot_mouse_move()
 {
     return canvas_.signal_plot_mouse_move;
 }
diff -Naur btg-0.9.7.orig/external/plotmm/plot.h btg-0.9.7/external/plotmm/plot.h
--- btg-0.9.7.orig/external/plotmm/plot.h	2008-03-25 13:49:08.000000000 +0100
+++ btg-0.9.7/external/plotmm/plot.h	2008-03-25 14:21:18.000000000 +0100
@@ -79,9 +79,9 @@
 	virtual void clear();
 	virtual void end_replot();
 
-	SigC::Signal3<void,int,int,GdkEventButton*> signal_plot_mouse_press;
-	SigC::Signal3<void,int,int,GdkEventButton*> signal_plot_mouse_release;
-	SigC::Signal3<void,int,int,GdkEventMotion*> signal_plot_mouse_move;
+	sigc::signal3<void,int,int,GdkEventButton*> signal_plot_mouse_press;
+	sigc::signal3<void,int,int,GdkEventButton*> signal_plot_mouse_release;
+	sigc::signal3<void,int,int,GdkEventMotion*> signal_plot_mouse_move;
 
     protected:
 	virtual bool on_expose_event(GdkEventExpose* event);
@@ -141,9 +141,9 @@
 	Scale *scale(PlotAxisID id) { return tickMark_[id]; }
 	PlotLabel *label(PlotAxisID id) { return axisLabel_[id]; }
 
-	SigC::Signal3<void,int,int,GdkEventButton*> signal_plot_mouse_press();
-	SigC::Signal3<void,int,int,GdkEventButton*> signal_plot_mouse_release();
-	SigC::Signal3<void,int,int,GdkEventMotion*> signal_plot_mouse_move();
+	sigc::signal3<void,int,int,GdkEventButton*> signal_plot_mouse_press();
+	sigc::signal3<void,int,int,GdkEventButton*> signal_plot_mouse_release();
+	sigc::signal3<void,int,int,GdkEventMotion*> signal_plot_mouse_move();
 
 	void set_selection(const Rectangle &r);
 	Rectangle get_selection() { return select_; }
diff -Naur btg-0.9.7.orig/external/plotmm/scale.h btg-0.9.7/external/plotmm/scale.h
--- btg-0.9.7.orig/external/plotmm/scale.h	2008-03-25 13:49:08.000000000 +0100
+++ btg-0.9.7/external/plotmm/scale.h	2008-03-25 14:21:18.000000000 +0100
@@ -133,7 +133,7 @@
 	/*! This signal is thrown whenever the scale is enabled or disabled
 	 *  \sa set_enabled, enabled
 	 */
-	SigC::Signal1<void,bool> signal_enabled;
+	sigc::signal1<void,bool> signal_enabled;
 
     protected:
 	virtual void on_realize();