diff --git a/man/HDF5AnnData.Rd b/man/HDF5AnnData.Rd
index 2dcb3140..ba099453 100644
--- a/man/HDF5AnnData.Rd
+++ b/man/HDF5AnnData.Rd
@@ -86,7 +86,7 @@ HDF5AnnData constructor
   varm = NULL,
   obsp = NULL,
   varp = NULL,
-  compression = NULL
+  compression = c("none", "gzip", "lzf")
 )}\if{html}{\out{</div>}}
 }
 
@@ -138,8 +138,8 @@ annotation arrays. It must be either \code{NULL} or a named list, where each
 element is a sparse matrix where each dimension has length \code{n_vars}.}
 
 \item{\code{compression}}{The compression algorithm to use when writing the
-HDF5 file. Can be one of \code{"GZIP"}, \code{"LZF"} or \code{"NONE"}. Defaults to
-\code{"NONE"}.}
+HDF5 file. Can be one of \code{"none"}, \code{"gzip"} or \code{"lzf"}. Defaults to
+\code{"none"}.}
 }
 \if{html}{\out{</div>}}
 }
diff --git a/man/to_HDF5AnnData.Rd b/man/to_HDF5AnnData.Rd
index f7142f50..e14aa376 100644
--- a/man/to_HDF5AnnData.Rd
+++ b/man/to_HDF5AnnData.Rd
@@ -4,14 +4,16 @@
 \alias{to_HDF5AnnData}
 \title{Convert an AnnData object to an HDF5AnnData object}
 \usage{
-to_HDF5AnnData(adata, file, ...)
+to_HDF5AnnData(adata, file, compression = c("none", "gzip", "lzf"))
 }
 \arguments{
 \item{adata}{An AnnData object to be converted to HDF5AnnData.}
 
 \item{file}{The filename (character) of the \code{.h5ad} file.}
 
-\item{...}{Arguments passed onto the initialization of HDF5AnnData.}
+\item{compression}{The compression algorithm to use when writing the
+HDF5 file. Can be one of \code{"none"}, \code{"gzip"} or \code{"lzf"}. Defaults to
+\code{"none"}.}
 }
 \value{
 An HDF5AnnData object with the same data as the input AnnData
diff --git a/man/write_h5ad.Rd b/man/write_h5ad.Rd
index 2a7a6297..8ff238b4 100644
--- a/man/write_h5ad.Rd
+++ b/man/write_h5ad.Rd
@@ -4,7 +4,7 @@
 \alias{write_h5ad}
 \title{Write H5AD}
 \usage{
-write_h5ad(object, path, ...)
+write_h5ad(object, path, compression = c("none", "gzip", "lzf"))
 }
 \arguments{
 \item{object}{The object to write, either a "SingleCellExperiment" or a
@@ -12,7 +12,9 @@ write_h5ad(object, path, ...)
 
 \item{path}{Path of the file to write to}
 
-\item{...}{Extra arguments will be passed to the appropriate convertor}
+\item{compression}{The compression algorithm to use when writing the
+HDF5 file. Can be one of \code{"none"}, \code{"gzip"} or \code{"lzf"}. Defaults to
+\code{"none"}.}
 }
 \value{
 \code{path} invisibly
diff --git a/man/write_h5ad_dense_array.Rd b/man/write_h5ad_dense_array.Rd
index 32820f57..001fa7a6 100644
--- a/man/write_h5ad_dense_array.Rd
+++ b/man/write_h5ad_dense_array.Rd
@@ -14,7 +14,7 @@ write_h5ad_dense_array(value, file, name, compression, version = "0.2.0")
 \item{name}{Name of the element within the H5AD file}
 
 \item{compression}{The compression to use when writing the element. Can be
-one of \code{"NONE"}, \code{"GZIP"} or \code{"LZF"}.}
+one of \code{"none"}, \code{"gzip"} or \code{"lzf"}. Defaults to \code{"none"}.}
 
 \item{version}{Encoding version of the element to write}
 }