diff --git a/spacy/ml/extract_spans.py b/spacy/ml/extract_spans.py
index d5e9bc07c..af6be78db 100644
--- a/spacy/ml/extract_spans.py
+++ b/spacy/ml/extract_spans.py
@@ -1,4 +1,4 @@
-from typing import Tuple, Callable
+from typing import List, Tuple, Callable
 from thinc.api import Model, to_numpy
 from thinc.types import Ragged, Ints1d
 
@@ -52,14 +52,14 @@ def _get_span_indices(ops, spans: Ragged, lengths: Ints1d) -> Ints1d:
     indices will be [5, 6, 7, 8, 8, 9].
     """
     spans, lengths = _ensure_cpu(spans, lengths)
-    indices = []
+    indices: List[int] = []
     offset = 0
     for i, length in enumerate(lengths):
         spans_i = spans[i].dataXd + offset
         for j in range(spans_i.shape[0]):
-            indices.append(ops.xp.arange(spans_i[j, 0], spans_i[j, 1]))  # type: ignore[call-overload, index]
+            indices.extend(range(spans_i[j, 0], spans_i[j, 1]))  # type: ignore[arg-type, call-overload]
         offset += length
-    return ops.flatten(indices, dtype="i", ndim_if_empty=1)
+    return ops.asarray1i(indices)
 
 
 def _ensure_cpu(spans: Ragged, lengths: Ints1d) -> Tuple[Ragged, Ints1d]: