diff --git a/src/Interface.jl b/src/Interface.jl
index 73cb98c0..466022ab 100644
--- a/src/Interface.jl
+++ b/src/Interface.jl
@@ -531,7 +531,7 @@ end
 
 function evaluate(ri::FragmentBasedReactiveFilmGrowthInterfaceConstantT, dydt, Vfilm, cstot)
     kfs, krevs = getkfskrevs(ri)
-    addreactionratecontributions!(dydt, ri.fragmentbasedrxnarray, ri.rxnarray, cstot, kfs, krevs, Vfilm, ri.domainfilm.indexes[3], ri.Mws, ri.domainfilm.indexes[1]:domainfilm.indexes[2])
+    addreactionratecontributions!(dydt, ri.fragmentbasedrxnarray, ri.rxnarray, cstot, kfs, krevs, Vfilm, ri.domainfilm.indexes[3], ri.Mws, ri.domainfilm.indexes[1]:ri.domainfilm.indexes[2])
     if hasproperty(ri.domain2, :epsilon)
         epsilon = ri.domain2.epsilon
         dydt[ri.domain2.thermovariabledict["V"]] = dydt[ri.domainfilm.indexes[3]] / ri.domainfilm.rho / (1 - epsilon) * epsilon