diff --git a/prism/src/simulator/simpath.cc b/prism/src/simulator/simpath.cc
index 16989e7e..4ba84498 100644
--- a/prism/src/simulator/simpath.cc
+++ b/prism/src/simulator/simpath.cc
@@ -405,6 +405,8 @@ void Backtrack(int step)
 	
 	Recalculate_Path_Formulae();
 	
+	Calculate_State_Reward(state_variables);
+	
 	Calculate_Updates(state_variables);
 	
 	loop_detection->Backtrack(step);