diff --git a/CHANGELOG.md b/CHANGELOG.md
index dc40f538db5e89dc51815e2d2466c1a615666750..bd382bc5e830dfd3eb428956b5dcfd2ba34e37f8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,11 @@ Differences Between DuMu<sup>x</sup> 3.3 and DuMu<sup>x</sup> 3.2
 
 - For the "sequential" models, the property `BoundaryTypes` has been simply renamed to `SequentialBoundaryTypes`
 - __Quadmath__: Dumux::Quad has been removed without deprecation. Use Dune::Float128 instead.
+- Within the RANS group, two additional runtime parameters have been included 'IsFlatWallBounded' and 'WriteFlatWallBoundedFields'.
+For both the K-Epsilon and Zero-eq RANS models the 'IsFlatWallBounded' runtime parameter should be set as True,
+as wall topology is not supported for these models with our geometric contraints. If not set as true, the geometry 
+will be checked before the model is run. If either the runtime parameter or the geometry check indicate non-flat walls, 
+the model will terminate. To add FlatWallBounded specific output to the vtk output, WriteFlatWallBoundedFields can be set as True.
 
 ### Deprecated properties/classes/functions/files, to be removed after 3.3: