diff --git a/Simulation/SimulationJobOptions/share/specialConfig/preInclude.AMSB.py b/Simulation/SimulationJobOptions/share/specialConfig/preInclude.AMSB.py
index f03999d55fdfbccb75cbc12f1407bac170f6936e..807f483982033307251339e220e4317484a90805 100644
--- a/Simulation/SimulationJobOptions/share/specialConfig/preInclude.AMSB.py
+++ b/Simulation/SimulationJobOptions/share/specialConfig/preInclude.AMSB.py
@@ -46,8 +46,8 @@ except:
     from G4AtlasApps.SimFlags import simFlags
     simdict = simFlags.specialConfiguration.get_Value()
 
-C1Mass = float(simdict["AMSBC1Mass"])
-N1Mass = float(simdict["AMSBN1Mass"])
+C1Mass = eval(simdict["AMSBC1Mass"])
+N1Mass = eval(simdict["AMSBN1Mass"])
 # patching PDGTABLE
 get_and_fix_PDGTABLE([(1000022, N1Mass, '~chi(0,1)', '0'), (1000024, C1Mass, '~chi(+,1)', '+')])