diff --git a/gusto/equations/boussinesq_equations.py b/gusto/equations/boussinesq_equations.py
index 50c6adecd..dc6977bc6 100644
--- a/gusto/equations/boussinesq_equations.py
+++ b/gusto/equations/boussinesq_equations.py
@@ -53,8 +53,6 @@ def __init__(self, domain, parameters,
                 the model's physical parameters.
             compressible (bool, optional): flag to indicate whether the
                 equations are compressible. Defaults to True
-            Omega (:class:`ufl.Expr`, optional): an expression for the planet's
-                rotation vector. Defaults to None.
             space_names (dict, optional): a dictionary of strings for names of
                 the function spaces to use for the spatial discretisation. The
                 keys are the names of the prognostic variables. Defaults to None
diff --git a/gusto/equations/compressible_euler_equations.py b/gusto/equations/compressible_euler_equations.py
index 9721b664e..5ba2874ba 100644
--- a/gusto/equations/compressible_euler_equations.py
+++ b/gusto/equations/compressible_euler_equations.py
@@ -47,8 +47,6 @@ def __init__(self, domain, parameters, sponge_options=None,
                 mesh and the compatible function spaces.
             parameters (:class:`Configuration`, optional): an object containing
                 the model's physical parameters.
-            Omega (:class:`ufl.Expr`, optional): an expression for the planet's
-                rotation vector. Defaults to None.
             sponge_options (:class:`SpongeLayerParameters`, optional): any
                 parameters for applying a sponge layer to the upper boundary.
                 Defaults to None.