diff --git a/Reconstruction/Jet/JetUtils/JetUtils/JetCaloCalculations.h b/Reconstruction/Jet/JetUtils/JetUtils/JetCaloCalculations.h
index ad7d7a1990ad73ad47a1d2d9212b5b11ff491899..2014380bc2f50ea127aa1120082f4720f5581d30 100644
--- a/Reconstruction/Jet/JetUtils/JetUtils/JetCaloCalculations.h
+++ b/Reconstruction/Jet/JetUtils/JetUtils/JetCaloCalculations.h
@@ -8,7 +8,6 @@
 #define JETUTILS_JETCALOHELPER_H
 
 #include "xAODJet/JetConstituentVector.h"
-#include "xAODJet/JetAttributes.h"
 
 #include <vector>
 
@@ -112,8 +111,8 @@ namespace jet {
 
   protected:
     std::string m_name;
-    xAOD::JetAttribute::AttributeID m_id; // unused for now.
-    CaloConstitHelpers::CaloConstitExtractor *m_constitExtractor; // used to retrieve the cluster moment from the constituent (which can be a PFO object or a cluster)
+    xAOD::JetAttribute::AttributeID m_id{}; // unused for now.
+    CaloConstitHelpers::CaloConstitExtractor *m_constitExtractor{}; // used to retrieve the cluster moment from the constituent (which can be a PFO object or a cluster)
   };
 
 
diff --git a/Reconstruction/Jet/JetUtils/JetUtils/JetCaloQualityUtils.h b/Reconstruction/Jet/JetUtils/JetUtils/JetCaloQualityUtils.h
index e859567d49bcce80b479c6ae834d8efd5e8dfd9c..dd24210467a081a1f43ed61b63939dc81cfa7bdf 100644
--- a/Reconstruction/Jet/JetUtils/JetUtils/JetCaloQualityUtils.h
+++ b/Reconstruction/Jet/JetUtils/JetUtils/JetCaloQualityUtils.h
@@ -18,7 +18,8 @@
 
 #include "JetUtils/JetCaloCalculations.h"
 #include "xAODJet/Jet.h"
-#include "xAODJet/JetAttributes.h"
+#include <vector>
+//#include "xAODJet/JetAttributes.h"
 
 
 namespace jet {
@@ -83,8 +84,8 @@ namespace jet {
   class JetCalcnLeadingCells: virtual public JetCaloCalculator {
   protected:
     std::vector<double> m_cell_energies;
-    double m_sumE_cells;
-    double m_threshold;
+    double m_sumE_cells{};
+    double m_threshold{};
 
     JETCALCFUNCDECL( JetCalcnLeadingCells, JetAttribute::N90Constituents, m_threshold = 0.9;);
   };
@@ -93,7 +94,7 @@ namespace jet {
   /* @brief Compute Out-Of-Time energy fraction */
   class JetCalcOutOfTimeEnergyFraction: virtual public JetCaloCalculator {
   protected:
-    double m_sumE,m_sumE_OOT;
+    double m_sumE{},m_sumE_OOT{};
   public:
     double timecut;
     bool onlyPosEnergy;
@@ -104,7 +105,7 @@ namespace jet {
 
   class JetCalcTimeCells: virtual public JetCaloCalculator {
   protected:
-    double m_time,m_norm;
+    double m_time{},m_norm{};
 
     JETCALCFUNCDECL( JetCalcTimeCells, JetAttribute::Timing, m_norm=0; );
 
@@ -114,7 +115,7 @@ namespace jet {
   /* @brief Compute the jet average quality factor */
   class JetCalcAverageLArQualityF: virtual public JetCaloCalculator {
   protected:  
-    double m_qf,m_norm;
+    double m_qf{},m_norm{};
     bool m_useTile;
     JETCALCFUNCDECL( JetCalcAverageLArQualityF, JetAttribute::AverageLArQF, m_useTile=false; m_norm=0;);
 
@@ -123,7 +124,7 @@ namespace jet {
   /* @brief Compute the jet quality factor information*/
   class JetCalcQuality: virtual public JetCaloCalculator {
   protected:
-    double m_totE, m_badE;
+    double m_totE{}, m_badE{};
 
   public:
     int LArQualityCut;
@@ -152,7 +153,7 @@ namespace jet {
   /* @brief total negative energy in a jet*/
   class JetCalcNegativeEnergy: virtual public JetCaloCalculator {
   protected:
-    double m_totE;
+    double m_totE{};
 
     JETCALCFUNCDECL( JetCalcNegativeEnergy, JetAttribute::NegativeE, m_totE=0; );
   };
@@ -160,7 +161,7 @@ namespace jet {
   /* @brief total negative energy in a jet*/
   class JetCalcCentroid: virtual public JetCaloCalculator {
   protected:
-    double m_totE, m_centroid_x, m_centroid_y, m_centroid_z;
+    double m_totE{}, m_centroid_x{}, m_centroid_y{}, m_centroid_z{};
 
 
     JETCALCFUNCDECL( JetCalcCentroid, JetAttribute::CentroidR, m_totE=0; );
@@ -169,8 +170,8 @@ namespace jet {
   /// Fraction of Bad energy in jet. From cluster moment ENG_BAD_CELLS
   class JetCalcBadCellsFrac : virtual public JetCaloCalculator {
   protected:
-    double m_totE;
-    double m_badE;
+    double m_totE{};
+    double m_badE{};
     JETCALCFUNCDECL( JetCalcBadCellsFrac, JetAttribute::BchCorrCell, setName("BchCorrCell"););
     
   };
diff --git a/Reconstruction/Jet/JetUtils/JetUtils/TiledEtaPhiMap.h b/Reconstruction/Jet/JetUtils/JetUtils/TiledEtaPhiMap.h
index 41ccc8ab9d3e65e128c48a4e676c426d11fc6e54..f7a783b31e78a6d096f7832cda80e5a55548b839 100644
--- a/Reconstruction/Jet/JetUtils/JetUtils/TiledEtaPhiMap.h
+++ b/Reconstruction/Jet/JetUtils/JetUtils/TiledEtaPhiMap.h
@@ -20,9 +20,8 @@
 
 #include <list>
 #include <vector>
-#include <iostream>
 
-#include <math.h>
+#include <cmath>
 
 
 #include "JetUtils/JetDistances.h"
@@ -32,7 +31,7 @@ namespace JetTiledMap {
   struct utils {
     static double DR2(double eta1, double phi1, double eta2,double phi2) {
       double deta = eta1 - eta2;
-      static double pi = acos(-1.0);
+      static double pi = std::acos(-1.0);
       static double twopi = 2.0*pi;
       double dphi = phi1 - phi2;
       while ( dphi > pi ) dphi -= twopi;
@@ -106,13 +105,13 @@ namespace JetTiledMap {
 
   protected:
 
-    double  m_etarange ;
-    double  m_halfetarange;
-    double m_rmax;
-    size_t m_ndivX, m_ndivY;
-    double m_sizeX,m_sizeY;
+    double  m_etarange{} ;
+    double  m_halfetarange{};
+    double m_rmax{};
+    size_t m_ndivX{}, m_ndivY{};
+    double m_sizeX{},m_sizeY{};
     
-    unsigned int m_size;
+    unsigned int m_size{};
     
 
     /// index of the tile containing p
diff --git a/Reconstruction/Jet/JetUtils/Root/JetCaloCalculations.cxx b/Reconstruction/Jet/JetUtils/Root/JetCaloCalculations.cxx
index 8b76f95509a9fcd6ab42fa9c4704d5d8f0133965..fcb24a21c08a1d10d7429ce536f987a9bbd86b62 100644
--- a/Reconstruction/Jet/JetUtils/Root/JetCaloCalculations.cxx
+++ b/Reconstruction/Jet/JetUtils/Root/JetCaloCalculations.cxx
@@ -3,14 +3,14 @@
 */
 
 
-#include "xAODJet/Jet.h"
+
 #include "xAODJet/JetAccessorMap.h"
 #include "xAODCaloEvent/CaloCluster.h"
 
 #include "xAODPFlow/PFO.h"
 
 #include "JetUtils/JetCaloCalculations.h"
-
+#include "xAODJet/JetAttributes.h"
 ////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////