diff --git a/Tracking/TrkFitter/TrkGaussianSumFilter/TrkGaussianSumFilter/MultiComponentStateModeCalculator.h b/Tracking/TrkFitter/TrkGaussianSumFilter/TrkGaussianSumFilter/MultiComponentStateModeCalculator.h
index 1dbdc237bdd82b276a3e346e7b3fcb0ac0087591..749ddab0d767c90b749e5e809bdede07664292c4 100755
--- a/Tracking/TrkFitter/TrkGaussianSumFilter/TrkGaussianSumFilter/MultiComponentStateModeCalculator.h
+++ b/Tracking/TrkFitter/TrkGaussianSumFilter/TrkGaussianSumFilter/MultiComponentStateModeCalculator.h
@@ -45,7 +45,7 @@ class MultiComponentStateModeCalculator : public AthAlgTool, virtual public IMul
 
  private:
 
-  //!< Private mixtureArray structure
+  //!< Private Mixture structure
   struct Mixture{
 
     // Default constructor