diff --git a/src/src/Interaction/VolumeInteractorStyle.cpp b/src/src/Interaction/VolumeInteractorStyle.cpp
index efde306..4ea3237 100644
--- a/src/src/Interaction/VolumeInteractorStyle.cpp
+++ b/src/src/Interaction/VolumeInteractorStyle.cpp
@@ -18,7 +18,9 @@
 
 vtkStandardNewMacro(VolumeInteractorStyle)
 
-VolumeInteractorStyle::VolumeInteractorStyle() {
+VolumeInteractorStyle::VolumeInteractorStyle():vtkInteractorStyleTrackballCamera()
+,InteractionMode(VOLUME_ROTATE3D)
+{
 
 }