diff --git a/pypdf/_cmap.py b/pypdf/_cmap.py
index 326c96ccb..7cab77c67 100644
--- a/pypdf/_cmap.py
+++ b/pypdf/_cmap.py
@@ -279,7 +279,7 @@ def parse_bfrange(
         fmt = b"%%0%dX" % (map_dict[-1] * 2)
         a = multiline_rg[0]  # a, b not in the current line
         b = multiline_rg[1]
-        for sq in lst[1:]:
+        for sq in lst[0:]:
             if sq == b"]":
                 closure_found = True
                 break