diff --git a/NPSimulation/src/VEventGenerator.cc b/NPSimulation/src/VEventGenerator.cc
index 128d1e71d448999630ee3b7c54133a2b0dc41920..608f4325161b90a394c606c4d3e1100c7320c15d 100644
--- a/NPSimulation/src/VEventGenerator.cc
+++ b/NPSimulation/src/VEventGenerator.cc
@@ -60,7 +60,7 @@ void VEventGenerator::RandomGaussian2D(double MeanX,double MeanY,double SigmaX,d
 		 else
 		 	{
 		 		X= MeanX;
-		 		Y= MeanY;
+		 		Y = m_RandomEngine.Gaus( MeanY , SigmaY) ;
 		 	}