diff --git a/NEWS.md b/NEWS.md
index 3acde75..309a313 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -2,6 +2,8 @@
 
 * BUG FIX: Use the right interface for the `all.equal()` function.
 
+* BUG FIX: Add `py_to_r` converter for `anndata.abc._AbstractCSDataset` (PR #xxx).
+
 # anndata 0.7.5.5
 
 * FUNCTIONALITY: Added initial support for loading AnnData with `backed=TRUE`.
diff --git a/R/reticulate_conversions.R b/R/reticulate_conversions.R
index 145d96c..a1a2480 100644
--- a/R/reticulate_conversions.R
+++ b/R/reticulate_conversions.R
@@ -100,6 +100,10 @@ py_to_r.scipy.sparse.csc.csc_matrix <- function(x) {
   )
 }
 
+py_to_r.anndata.abc._AbstractCSDataset <- function(x) {
+  py_to_r_ifneedbe(x$to_memory())
+}
+
 # TODO: could add mapping specifically for:
 # * adpy$layers: anndata._core.aligned_mapping.Layers
 # * adpy$obsm: anndata._core.aligned_mapping.AxisArrays