diff --git a/thyme.m b/thyme.m
index 0d2d6e2..f03b771 100644
--- a/thyme.m
+++ b/thyme.m
@@ -4,6 +4,6 @@ function y = thyme(Sys,Exp,Opt)
 %   Takes Triplett populations into account when performing esfit.
 %   Call as [B,Spec] = esfit('thyme',Sys,Exp,Opt);
 
-	Exp.Temperature = Sys.Temperature;
+	Sys.Temperature = Exp.Temperature;
     y = pepper(Sys,Exp,Opt);
 end
\ No newline at end of file