diff --git a/Geometry/CommonDetUnit/interface/GeomDetEnumerators.h b/Geometry/CommonDetUnit/interface/GeomDetEnumerators.h
index cc90560f8b817..5f1731af532f4 100644
--- a/Geometry/CommonDetUnit/interface/GeomDetEnumerators.h
+++ b/Geometry/CommonDetUnit/interface/GeomDetEnumerators.h
@@ -8,13 +8,13 @@
  */
 namespace GeomDetEnumerators {
   enum Location {barrel, endcap, invalidLoc};
-  enum SubDetector {PixelBarrel, PixelEndcap, TIB, TOB, TID, TEC, CSC, DT, RPCBarrel, RPCEndcap, GEM, ME0, P2OTB, P2OTEC, P1PXB, P1PXEC, P2PXEC, invalidDet};
+  enum SubDetector {PixelBarrel, PixelEndcap, TIB, TOB, TID, TEC, CSC, DT, RPCBarrel, RPCEndcap, GEM, ME0, P2OTB, P2OTEC, P1PXB, P1PXEC, P2PXEC, TimingBarrel, TimingEndcap, invalidDet};
   // gives subdetId in DetId conrrepsonding to the above
-  constexpr unsigned int subDetId[18]={1,2,3,5,4,6, 0, 0,0,0,0,0,5,4,1,2,2, 0}; // don't ask, don't ask, simply do not ask!
+  constexpr unsigned int subDetId[20]={1,2,3,5,4,6, 0, 0,0,0,0,0,5,4,1,2,2, 2,2, 0}; // don't ask, don't ask, simply do not ask!
   //inverse (only for tracker)
   constexpr SubDetector tkDetEnum[8]={invalidDet, PixelBarrel, PixelEndcap, TIB, TID, TOB, TEC, invalidDet}; // don't ask, don't ask, simply do not ask!
   //to convert a physical subdetector (it could be larger than 5) into a geometry subdetector (between 0 and 5). ONLY for tracker
-  constexpr SubDetector subDetGeom[18]={PixelBarrel, PixelEndcap, TIB, TOB, TID, TEC, invalidDet, invalidDet, invalidDet, invalidDet, invalidDet, invalidDet, TOB, TID, PixelBarrel, PixelEndcap, PixelEndcap, invalidDet};
+  constexpr SubDetector subDetGeom[20]={PixelBarrel, PixelEndcap, TIB, TOB, TID, TEC, invalidDet, invalidDet, invalidDet, invalidDet, invalidDet, invalidDet, TOB, TID, PixelBarrel, PixelEndcap, PixelEndcap, invalidDet, invalidDet, invalidDet};
 
 bool isBarrel(GeomDetEnumerators::SubDetector m);
 bool isEndcap(GeomDetEnumerators::SubDetector m);
@@ -28,6 +28,7 @@ bool isRPC(const GeomDetEnumerators::SubDetector m);
 bool isGEM(const GeomDetEnumerators::SubDetector m);
 bool isME0(const GeomDetEnumerators::SubDetector m);
 bool isMuon(const GeomDetEnumerators::SubDetector m);
+bool isTiming(const GeomDetEnumerators::SubDetector m);
  
 }
 
diff --git a/Geometry/CommonDetUnit/src/GeomDetEnumerators.cc b/Geometry/CommonDetUnit/src/GeomDetEnumerators.cc
index 6d62fe5ef9f09..63d3810778729 100644
--- a/Geometry/CommonDetUnit/src/GeomDetEnumerators.cc
+++ b/Geometry/CommonDetUnit/src/GeomDetEnumerators.cc
@@ -25,13 +25,15 @@ std::ostream& operator<<( std::ostream& s, SubDetector m){
   else if ( m == P1PXB ) return s << "Phase1PixelBarrel";
   else if ( m == P1PXEC ) return s << "Phase1PixelEndcap";
   else if ( m == P2PXEC ) return s << "Phase2PixelEndcap";
+  else if ( m == TimingBarrel ) return s << "Phase2TimingBarrel";
+  else if ( m == TimingEndcap ) return s << "Phase2TimingEndcap";
   else return s << "?";
 }
 
 
 bool GeomDetEnumerators::isBarrel(const GeomDetEnumerators::SubDetector subdet)
 {
-  return (subdet == PixelBarrel || subdet == TIB || subdet == TOB || subdet == P1PXB || subdet == P2OTB || isDT(subdet) || subdet == RPCBarrel);
+  return (subdet == PixelBarrel || subdet == TIB || subdet == TOB || subdet == P1PXB || subdet == P2OTB || isDT(subdet) || subdet == RPCBarrel || subdet == TimingBarrel );
 }
 
 bool GeomDetEnumerators::isEndcap(const GeomDetEnumerators::SubDetector subdet)
@@ -90,3 +92,8 @@ bool GeomDetEnumerators::isMuon(const GeomDetEnumerators::SubDetector subdet)
 {
   return (subdet == DT || subdet == CSC || isRPC(subdet) || subdet == GEM || subdet == ME0) ;
 }
+
+bool GeomDetEnumerators::isTiming(const GeomDetEnumerators::SubDetector subdet)
+{
+  return ( subdet == TimingBarrel || subdet == TimingEndcap ) ;
+}