diff --git a/src/avtk/avtk_dial.h b/src/avtk/avtk_dial.h
index 543aa47..294f491 100644
--- a/src/avtk/avtk_dial.h
+++ b/src/avtk/avtk_dial.h
@@ -30,9 +30,10 @@ namespace Avtk
 class Dial : public Fl_Slider
 {
 public:
-	Dial(int _x, int _y, int _w, int _h, const char* _lab=0):
-		Fl_Slider(_x, _y, _w, _h, _lab)
+	Dial(int _x, int _y, int _w, int _h, const char* _label=0):
+		Fl_Slider(_x, _y, _w, _h)
 	{
+		copy_label(_label);
 		x = _x;
 		y = _y;
 		w = _w;
@@ -49,7 +50,6 @@ public:
 	bool highlight;
 	bool pan_style;
 	int x, y, w, h;
-	char* _label;
 
 	float radius;
 	float lineWidth;
diff --git a/src/avtk/avtk_image.h b/src/avtk/avtk_image.h
index 09fe8c0..2546ffe 100644
--- a/src/avtk/avtk_image.h
+++ b/src/avtk/avtk_image.h
@@ -40,15 +40,14 @@ class Image : public Fl_Widget
 {
 public:
 	Image(int _x, int _y, int _w, int _h, const char *_label=0 ):
-		Fl_Widget(_x, _y, _w, _h, _label)
+		Fl_Widget(_x, _y, _w, _h)
 	{
+		copy_label(_label);
 		x = _x;
 		y = _y;
 		w = _w;
 		h = _h;
 
-		label = _label;
-
 		bits = -1;
 		imageDataPtr = 0;
 
@@ -65,7 +64,6 @@ public:
 	}
 
 	int x, y, w, h;
-	const char* label;
 
 	int bits;
 	const unsigned char* imageDataPtr;
diff --git a/src/avtk/avtk_light_button.h b/src/avtk/avtk_light_button.h
index c664e76..ee3a46c 100644
--- a/src/avtk/avtk_light_button.h
+++ b/src/avtk/avtk_light_button.h
@@ -31,6 +31,8 @@ public:
 	LightButton(int _x, int _y, int _w, int _h, const char *_label):
 		Fl_Button(_x, _y, _w, _h)
 	{
+		copy_label(_label);
+
 		x = _x;
 		y = _y;
 		w = _w;