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-rw-r--r--ftnoir_tracker_base/ftnoir_tracker_base.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/ftnoir_tracker_base/ftnoir_tracker_base.h b/ftnoir_tracker_base/ftnoir_tracker_base.h
index e9e11b61..66304bd7 100644
--- a/ftnoir_tracker_base/ftnoir_tracker_base.h
+++ b/ftnoir_tracker_base/ftnoir_tracker_base.h
@@ -41,7 +41,7 @@
// Instances are obtained via factory function.
struct ITracker
{
- virtual ~ITracker() {}
+ virtual ~ITracker() = 0;
virtual void StartTracker( QFrame* frame ) = 0;
virtual bool GiveHeadPoseData(double *data) = 0;
};