diff --git a/MC/config/PWGHF/external/generator/generator_pythia8_embed_hf.C b/MC/config/PWGHF/external/generator/generator_pythia8_embed_hf.C
index f04f5f13f..8ce738c72 100644
--- a/MC/config/PWGHF/external/generator/generator_pythia8_embed_hf.C
+++ b/MC/config/PWGHF/external/generator/generator_pythia8_embed_hf.C
@@ -86,7 +86,7 @@ Bool_t importParticles() override
 
       /// copy the particles from the HF event in the particle stack
       auto particlesHfEvent = mGeneratorEvHF->getParticles();
-      for(int iPart=0; iPart<=particlesHfEvent.size(); iPart++) {
+      for(int iPart=0; iPart<particlesHfEvent.size(); iPart++) {
         mParticles.push_back(TParticle(particlesHfEvent.at(iPart)));
       }