diff --git a/opm/autodiff/VFPInjProperties.cpp b/opm/autodiff/VFPInjProperties.cpp
index 698b9983d..814ba00e2 100644
--- a/opm/autodiff/VFPInjProperties.cpp
+++ b/opm/autodiff/VFPInjProperties.cpp
@@ -75,12 +75,11 @@ VFPInjProperties::ADB VFPInjProperties::bhp(const std::vector<int>& table_id,
         const Wells& wells,
         const ADB& qs,
         const ADB& thp) const {
-    const int np = wells.number_of_phases;
     const int nw = wells.number_of_wells;
 
     //Short-hands for water / oil / gas phases
     //TODO enable support for two-phase.
-    assert(np == 3);
+    assert(wells.number_of_phases == 3);
     const ADB& w = subset(qs, Span(nw, 1, BlackoilPhases::Aqua*nw));
     const ADB& o = subset(qs, Span(nw, 1, BlackoilPhases::Liquid*nw));
     const ADB& g = subset(qs, Span(nw, 1, BlackoilPhases::Vapour*nw));
diff --git a/opm/autodiff/VFPProdProperties.cpp b/opm/autodiff/VFPProdProperties.cpp
index 6c39eef77..84d4b2601 100644
--- a/opm/autodiff/VFPProdProperties.cpp
+++ b/opm/autodiff/VFPProdProperties.cpp
@@ -61,12 +61,11 @@ VFPProdProperties::ADB VFPProdProperties::bhp(const std::vector<int>& table_id,
         const ADB& qs,
         const ADB& thp,
         const ADB& alq) const {
-    const int np = wells.number_of_phases;
     const int nw = wells.number_of_wells;
 
     //Short-hands for water / oil / gas phases
     //TODO enable support for two-phase.
-    assert(np == 3);
+    assert(wells.number_of_phases == 3);
     const ADB& w = subset(qs, Span(nw, 1, BlackoilPhases::Aqua*nw));
     const ADB& o = subset(qs, Span(nw, 1, BlackoilPhases::Liquid*nw));
     const ADB& g = subset(qs, Span(nw, 1, BlackoilPhases::Vapour*nw));