diff --git a/lecture/mm/henryproblem/henry1p2c/boxfickslawdispersion.hh b/lecture/mm/henryproblem/henry1p2c/boxfickslawdispersion.hh
index 32f3f066d0ef6e8ebff7d7304801a0a82dee19cb..e85a2fc3d4efb6094e237f06cb5d42da830d5b1a 100644
--- a/lecture/mm/henryproblem/henry1p2c/boxfickslawdispersion.hh
+++ b/lecture/mm/henryproblem/henry1p2c/boxfickslawdispersion.hh
@@ -63,8 +63,8 @@ class FicksLawDispersionImplementation<TypeTag, DiscretizationMethod::box>
     enum { dimWorld = GridView::dimensionworld} ;
     enum
     {
-        numPhases = ModelTraits::numPhases(),
-        numComponents = ModelTraits::numComponents()
+        numPhases = ModelTraits::numFluidPhases(),
+        numComponents = ModelTraits::numFluidComponents()
     };
 
     static_assert(numPhases==1, "Dispersion only works for one phase!");