diff --git a/CHANGELOG b/CHANGELOG
index 33a3f74150d76136d60ba6eac46c0eb6894e95be..36f3f8fbfce319fc3f195dbaa4a80fd0ad15a048 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -107,6 +107,8 @@ Differences Between DuMuX 2.6 and DuMuX 2.7
 
   - CellData2P2Cmultiphysics, replaced by CellData2P2CMultiPhysics.
 
+  - BoxLocalOperator from dumux/multidomain/common/pdelablocaloperator.hh.
+
 * Deprecated MEMBER FUNCTIONS, to be removed after 2.7:
   - The functions "heatCapacity", "densitySolid" (mpnc only) and
     "thermalConductivitySolid/Fluid" in the VolumeVariables of the nonisothermal
diff --git a/dumux/multidomain/common/pdelablocaloperator.hh b/dumux/multidomain/common/pdelablocaloperator.hh
index 334cea9ad862bc3d18d1145068e863321880746f..e6af9bd660f2f4a5b9230899344c128a26f9e56e 100644
--- a/dumux/multidomain/common/pdelablocaloperator.hh
+++ b/dumux/multidomain/common/pdelablocaloperator.hh
@@ -24,6 +24,8 @@
 #ifndef DUMUX_PDELAB_LOCAL_OPERATOR_HH
 #define DUMUX_PDELAB_LOCAL_OPERATOR_HH
 
+#warning This header is deprecated and will be removed after DuMuX 2.7.
+
 #if ! HAVE_DUNE_PDELAB
 #error "DUNE-PDELab must be available in order to include this file!"
 #endif