diff --git a/PYTHIA8/AliPythia8/AliDecayerPythia8.cxx b/PYTHIA8/AliPythia8/AliDecayerPythia8.cxx
index 58e23680845..e3dc57762fd 100644
--- a/PYTHIA8/AliPythia8/AliDecayerPythia8.cxx
+++ b/PYTHIA8/AliPythia8/AliDecayerPythia8.cxx
@@ -36,7 +36,6 @@ AliDecayerPythia8::AliDecayerPythia8():
   fPythia8(AliTPythia8::Instance()),
   fDebug(0),
   fDecay(kAll),
-  fEnableLongLivedDecay(kFALSE),
   fHeavyFlavour(kTRUE)
 {
     // Constructor
@@ -96,18 +95,12 @@ void AliDecayerPythia8::Init()
     }
  
     fPythia8->ReadString("111:onMode = on");
-    
-//...Switch off decay of K0S, Lambda, Sigma+-, Xi0-, Omega-.
-    if(!fEnableLongLivedDecay) {
-      fPythia8->ReadString("310:onMode  = off");
-      fPythia8->ReadString("3122:onMode = off");
-      fPythia8->ReadString("3112:onMode = off");
-      fPythia8->ReadString("3222:onMode = off");
-      fPythia8->ReadString("3312:onMode = off");
-      fPythia8->ReadString("3322:onMode = off");
-      fPythia8->ReadString("3334:onMode = off");
-    }
-// .. Force decay channels
+
+    // implement ALICE primary particle definition 
+    fPythia8->ReadString("ParticleDecays:limitTau0 = on"); // set long-lived particle stable ...
+    fPythia8->ReadString("ParticleDecays:tau0Max = 10"); // ... if c*tau0 > 10 mm/c
+
+    // .. Force decay channels
     ForceDecay();
 }
 
diff --git a/PYTHIA8/AliPythia8/AliDecayerPythia8.h b/PYTHIA8/AliPythia8/AliDecayerPythia8.h
index f18f178ce2b..8f38b201291 100644
--- a/PYTHIA8/AliPythia8/AliDecayerPythia8.h
+++ b/PYTHIA8/AliPythia8/AliDecayerPythia8.h
@@ -24,7 +24,6 @@ class AliDecayerPythia8 : public TVirtualMCDecayer {
   virtual Int_t   ImportParticles(TClonesArray *particles);
   virtual void    SetForceDecay(Decay_t decay) {fDecay=decay;}
   virtual void    SetForceDecay(Int_t decay)   {SetForceDecay((Decay_t) decay);}
-  virtual void    SetLongLivedDecay(bool val = true) { fEnableLongLivedDecay = val; }
   virtual void    ForceDecay();
   virtual Float_t GetPartialBranchingRatio(Int_t ipart);
   virtual void    HeavyFlavourOff() {fHeavyFlavour = kFALSE;}
@@ -46,10 +45,9 @@ class AliDecayerPythia8 : public TVirtualMCDecayer {
   Int_t         fDebug;                 // Debug level
  
   Decay_t       fDecay;                 //  Forced decay mode
-  bool          fEnableLongLivedDecay;  // To enable long lived particle decay
   Bool_t        fHeavyFlavour;          //! Flag for heavy flavors
   static Bool_t fgInit;                 //! initialization flag 
-  ClassDef(AliDecayerPythia8, 3)        // Particle Decayer using Pythia8
+  ClassDef(AliDecayerPythia8, 4)        // Particle Decayer using Pythia8
 };
 #endif