diff --git a/openmc/data/ace.py b/openmc/data/ace.py
index 97be6f6275..06c581b426 100644
--- a/openmc/data/ace.py
+++ b/openmc/data/ace.py
@@ -573,11 +573,11 @@ def get_libraries_from_xsdata(path):
         List of paths to ACE libraries
     """
     xsdata = Path(path)
-    with open(xsdata, 'r') as xsdata:
+    with open(xsdata, 'r') as xsdata_file:
         # As in get_libraries_from_xsdir, we use a dict for O(1) membership
         # check while retaining insertion order
         libraries = OrderedDict()
-        for line in xsdata:
+        for line in xsdata_file:
             words = line.split()
             if len(words) >= 9:
                 lib = (xsdata.parent / words[8]).resolve()