diff --git a/jax_cfd/base/boundaries.py b/jax_cfd/base/boundaries.py
index 275aad2..ea94021 100644
--- a/jax_cfd/base/boundaries.py
+++ b/jax_cfd/base/boundaries.py
@@ -525,7 +525,7 @@ class HomogeneousBoundaryConditions(ConstantBoundaryConditions):
   Example usage:
     grid = Grid((10, 10))
     array = GridArray(np.zeros((10, 10)), offset=(0.5, 0.5), grid)
-    bc = ConstantBoundaryConditions(((BCType.PERIODIC, BCType.PERIODIC),
+    bc = HomogeneousBoundaryConditions(((BCType.PERIODIC, BCType.PERIODIC),
                                         (BCType.DIRICHLET, BCType.DIRICHLET)))
     u = GridVariable(array, bc)