diff --git a/dumux/porousmediumflow/implicit/fluxvariablescache.hh b/dumux/porousmediumflow/implicit/fluxvariablescache.hh
index a7c02b5ac28fb8029dd46015d9b6e0afe9af63c4..bbeb0368a15f98cd3a56574b13a9f744f25d307d 100644
--- a/dumux/porousmediumflow/implicit/fluxvariablescache.hh
+++ b/dumux/porousmediumflow/implicit/fluxvariablescache.hh
@@ -38,6 +38,7 @@ namespace Properties
 // forward declaration
 NEW_PROP_TAG(NumPhases);
 NEW_PROP_TAG(InteriorBoundaryData);
+NEW_PROP_TAG(EnableInteriorBoundaries);
 }
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////