diff --git a/src/error_align/path_to_alignment.py b/src/error_align/path_to_alignment.py
index 97c6796..c53c8be 100644
--- a/src/error_align/path_to_alignment.py
+++ b/src/error_align/path_to_alignment.py
@@ -37,6 +37,8 @@ def get_insert_alignment(
         op_type=OpType.INSERT,
         hyp_slice=hyp_slice,
         hyp=subgraph_metadata.hyp_raw[hyp_slice],
+        left_compound=subgraph_metadata.hyp_idx_map[start_hyp_idx] >= 0,
+        right_compound=subgraph_metadata.hyp_idx_map[end_hyp_idx - 1] >= 0,
     )
 
 
diff --git a/tests/test_default.py b/tests/test_default.py
index b728a20..19e8239 100644
--- a/tests/test_default.py
+++ b/tests/test_default.py
@@ -71,6 +71,23 @@ def test_error_align_identical() -> None:
         assert alignment.op_type == OpType.MATCH
 
 
+def test_partial_substitution_and_insertion() -> None:
+    """Test error alignment for partial substitutions and insertions with compound markers."""
+
+    ref = "test"
+    hyp = "testpartial"
+
+    alignments = error_align(ref, hyp)
+
+    assert len(alignments) == 2
+    assert alignments[0].op_type == OpType.SUBSTITUTE
+    assert alignments[0].left_compound is False
+    assert alignments[0].right_compound is True
+    assert alignments[1].op_type == OpType.INSERT
+    assert alignments[1].left_compound is True
+    assert alignments[1].right_compound is False
+
+
 def test_categorize_char() -> None:
     """Test character categorization."""