diff --git a/pypdf/_cmap.py b/pypdf/_cmap.py
index 03669abe3..74b4f0fe1 100644
--- a/pypdf/_cmap.py
+++ b/pypdf/_cmap.py
@@ -382,7 +382,7 @@ def compute_space_width(
             w = []
         while len(w) > 0:
             st = w[0]
-            second = w[1]
+            second = w[1].get_object()
             if isinstance(second, int):
                 for x in range(st, second):
                     w1[x] = w[2]
diff --git a/tests/test_cmap.py b/tests/test_cmap.py
index 438ca1f40..a371b92fe 100644
--- a/tests/test_cmap.py
+++ b/tests/test_cmap.py
@@ -122,3 +122,13 @@ def test_iss1533():
     reader = PdfReader(BytesIO(get_pdf_from_url(url, name=name)))
     reader.pages[0].extract_text()  # no error
     assert build_char_map("/F", 200, reader.pages[0])[3]["\x01"] == "Ü"
+
+
+@pytest.mark.enable_socket()
+def test_iss1718(caplog):
+    url = "https://github.com/py-pdf/pypdf/files/10983477/Ballinasloe_WS.pdf"
+    name = "iss1718.pdf"
+    reader = PdfReader(BytesIO(get_pdf_from_url(url, name=name)))
+    for p in reader.pages:
+        _txt = p.extract_text()
+    assert caplog.text == ""