diff --git a/GUI/Model/Device/Instrument.cpp b/GUI/Model/Device/Instrument.cpp
index 03e260ebbe835b60aed619f1435e3d1560b6d616..73fb065b6c31399310eda0e70744779ebddd5fd7 100644
--- a/GUI/Model/Device/Instrument.cpp
+++ b/GUI/Model/Device/Instrument.cpp
@@ -34,8 +34,3 @@ const IDetector& Instrument::detector() const
 {
     return *m_detector;
 }
-
-IDetector& Instrument::detector()
-{
-    return *m_detector;
-}
diff --git a/GUI/Model/Device/Instrument.h b/GUI/Model/Device/Instrument.h
index 4d10c322ecc1f49abd3dc7bc83957ad1f2fda1dc..85daa6f30093aef50fc079239fa71440a1f849a3 100644
--- a/GUI/Model/Device/Instrument.h
+++ b/GUI/Model/Device/Instrument.h
@@ -31,7 +31,6 @@ public:
     const Beam& beam() const { return *m_beam; }
 
     const IDetector* getDetector() const;
-    IDetector& detector();
     const IDetector& detector() const;
 
 protected: