diff --git a/benchmarks/single/pi-_1GeV_3to45deg.steer b/benchmarks/single/pi-_1GeV_3to45deg.steer
index f547e2e116d6b7a7bb1896dae75ee09090195fb5..40d767e5e0037f91e293e53dd3fc7ad5c468a2f6 100644
--- a/benchmarks/single/pi-_1GeV_3to45deg.steer
+++ b/benchmarks/single/pi-_1GeV_3to45deg.steer
@@ -3,7 +3,7 @@ from g4units import mm, GeV, MeV, degree
 SIM = DD4hepSimulation()
 
 SIM.gun.energy = 1*GeV
-SIM.gun.particle = "e-"
+SIM.gun.particle = "pi-"
 SIM.gun.position = (0.0, 0.0, 0.0)
 SIM.gun.direction = (0.0, 0.0, 1.0)
 SIM.gun.distribution = "cos(theta)"