diff --git a/R/vertex-filter.R b/R/vertex-filter.R
index c668199f..f862590d 100644
--- a/R/vertex-filter.R
+++ b/R/vertex-filter.R
@@ -94,11 +94,13 @@ wk_vertex_filter <- function(handler, add_details = FALSE) {
 #' @export
 wk_coords.wk_xy <- function(handleable, ...) {
   feature_id <- seq_along(handleable)
-  not_empty <- !Reduce("&", lapply(unclass(handleable), is.nan))
+  is_na <- Reduce("&", lapply(unclass(handleable), is.na))
+  is_nan <- Reduce("&", lapply(unclass(handleable), is.nan))
+  has_coord <- !is_na & !is_nan
 
-  if (!all(not_empty)) {
-    handleable <- handleable[not_empty]
-    feature_id <- feature_id[not_empty]
+  if (!all(has_coord)) {
+    handleable <- handleable[has_coord]
+    feature_id <- feature_id[has_coord]
   }
 
   new_data_frame(
diff --git a/src/vertex-filter.c b/src/vertex-filter.c
index 08ca2314..54876c17 100644
--- a/src/vertex-filter.c
+++ b/src/vertex-filter.c
@@ -128,11 +128,6 @@ int wk_vertex_filter_feature_start(const wk_vector_meta_t* meta, R_xlen_t feat_i
   return WK_CONTINUE;
 }
 
-int wk_vertex_filter_feature_null(void* handler_data) {
-  vertex_filter_t* vertex_filter = (vertex_filter_t*)handler_data;
-  return vertex_filter->next->null_feature(vertex_filter->next->handler_data);
-}
-
 int wk_vertex_filter_feature_end(const wk_vector_meta_t* meta, R_xlen_t feat_id,
                                  void* handler_data) {
   return WK_CONTINUE;
@@ -234,7 +229,6 @@ SEXP wk_c_vertex_filter_new(SEXP handler_xptr, SEXP add_details) {
   handler->vector_end = &wk_vertex_filter_vector_end;
 
   handler->feature_start = &wk_vertex_filter_feature_start;
-  handler->null_feature = &wk_vertex_filter_feature_null;
   handler->feature_end = &wk_vertex_filter_feature_end;
 
   handler->geometry_start = &wk_vertex_filter_geometry_start;
diff --git a/tests/testthat/test-vertex-filter.R b/tests/testthat/test-vertex-filter.R
index 6cad4bb0..1143139b 100644
--- a/tests/testthat/test-vertex-filter.R
+++ b/tests/testthat/test-vertex-filter.R
@@ -2,11 +2,11 @@
 test_that("wk_vertices() works", {
   expect_identical(
     wk_vertices(wkt(c("POINT (0 0)", "POINT (1 1)", NA))),
-    wkt(c("POINT (0 0)", "POINT (1 1)", NA))
+    wkt(c("POINT (0 0)", "POINT (1 1)"))
   )
   expect_identical(
     wk_vertices(wkt(c("LINESTRING (0 0, 1 1)", NA))),
-    wkt(c("POINT (0 0)", "POINT (1 1)", NA))
+    wkt(c("POINT (0 0)", "POINT (1 1)"))
   )
   expect_error(wk_vertices(new_wk_wkt("POINT ENTPY")), "ENTPY")