diff --git a/src/meshes/mesh_io.jl b/src/meshes/mesh_io.jl
index 1e0eea1b7c..271e315fe2 100644
--- a/src/meshes/mesh_io.jl
+++ b/src/meshes/mesh_io.jl
@@ -6,7 +6,8 @@
 #! format: noindent
 
 # Save current mesh with some context information as an HDF5 file.
-function save_mesh_file(mesh::Union{TreeMesh, P4estMesh, P4estMeshView, T8codeMesh}, output_directory,
+function save_mesh_file(mesh::Union{TreeMesh, P4estMesh, P4estMeshView, T8codeMesh},
+                        output_directory,
                         timestep = 0)
     save_mesh_file(mesh, output_directory, timestep, mpi_parallel(mesh))
 end