diff --git a/man/nanoarrow.Rd b/man/nanoarrow.Rd
index 7af2018a2..3ecaf02a4 100644
--- a/man/nanoarrow.Rd
+++ b/man/nanoarrow.Rd
@@ -16,13 +16,13 @@
 \alias{as_record_batch_reader.DataFrame}
 \title{polars to nanoarrow and arrow}
 \usage{
-as_nanoarrow_array_stream.DataFrame(x, ..., schema = NULL)
+\method{as_nanoarrow_array_stream}{DataFrame}(x, ..., schema = NULL)
 
-infer_nanoarrow_schema.DataFrame(x, ...)
+\method{infer_nanoarrow_schema}{DataFrame}(x, ...)
 
-as_arrow_table.DataFrame(x, ...)
+\method{as_arrow_table}{DataFrame}(x, ...)
 
-as_record_batch_reader.DataFrame(x, ..., schema = NULL)
+\method{as_record_batch_reader}{DataFrame}(x, ..., schema = NULL)
 }
 \arguments{
 \item{x}{a polars DataFrame}
diff --git a/src/rust/src/utils/mod.rs b/src/rust/src/utils/mod.rs
index ec0794f4b..9b2a02470 100644
--- a/src/rust/src/utils/mod.rs
+++ b/src/rust/src/utils/mod.rs
@@ -551,7 +551,7 @@ pub fn robj_to_rchoice(robj: extendr_api::Robj) -> RResult<String> {
     match opt_str {
         // NA_CHARACTER not allowed as first element return error
         Ok(Some(rstr)) if rstr.is_na() => {
-            Err(RPolarsErr::new().notachoice("NA_character is not allowed".into()))
+            Err(RPolarsErr::new().notachoice("NA_character_ is not allowed".into()))
         }
 
         // At least one string, return first string
diff --git a/tests/testthat/test-robj_to_rchoice.R b/tests/testthat/test-robj_to_rchoice.R
index 5bfc4c106..e7d87b340 100644
--- a/tests/testthat/test-robj_to_rchoice.R
+++ b/tests/testthat/test-robj_to_rchoice.R
@@ -8,7 +8,7 @@ test_that("robj_to_rchoice", {
 
     # NA chr not allowed as first element
     ctx = test_robj_to_rchoice(NA_character_)$err$contexts()
-    expect_identical(ctx$NotAChoice,  "NA_character is not allowed")
+    expect_identical(ctx$NotAChoice,  "NA_character_ is not allowed")
 
     # empty chr vec not allowed as first element
     ctx = test_robj_to_rchoice(character())$err$contexts()