1 files changed, 2 insertions, 1 deletions
diff --git a/mass.h b/mass.h
index 9c58660..778a0b4 100644
--- a/mass.h
+++ b/mass.h
@@ -28,6 +28,7 @@
 #define MASS_H
 
 #include "global.h"
+#include "vec3d.h"
 
 class Mass
 {
@@ -100,7 +101,7 @@ private:
     double	m_scale;
     double	m_x,m_y,m_z;
     double	m_prevx,m_prevy,m_prevz;
-    double	m_dx,m_dy,m_dz;
+    Vec3D	m_delta;
     GLfloat	m_r,m_g,m_b;
 
     bool	m_massless;