diff --git a/pygromos/files/coord/cnf.py b/pygromos/files/coord/cnf.py
index a8382c31..7938ba11 100644
--- a/pygromos/files/coord/cnf.py
+++ b/pygromos/files/coord/cnf.py
@@ -1058,7 +1058,7 @@ def get_pdb(self, connectivity_top=None) -> str:
 
         output_lines = ["TITLE " + str(self.TITLE).replace("END", "")]
         if hasattr(self, "GENBOX"):
-            lengths = [l * 10 for l in self.GENBOX.length]
+            lengths = [length * 10 for length in self.GENBOX.length]
             angles = self.GENBOX.angles
             output_lines.append(
                 "CRYST1{:>9.3f}{:>9.3f}{:>9.3f}{:>7.2f}{:>7.2f}{:>7.2f} P 1           1".format(*lengths, *angles)
diff --git a/pygromos/files/trajectory/trc.py b/pygromos/files/trajectory/trc.py
index d3d9df90..8fce5348 100644
--- a/pygromos/files/trajectory/trc.py
+++ b/pygromos/files/trajectory/trc.py
@@ -418,8 +418,8 @@ def parse_timestep(self, fh):
     def parse_genbox(self, fh):
         "Parse a genbox block from an iterator yielding lines (i.e., an open file)"
         next(fh)
-        lengths = tuple(float(l) for l in next(fh).split())
-        angles = tuple(float(a) for a in next(fh).split())
+        lengths = tuple(float(length) for length in next(fh).split())
+        angles = tuple(float(angle) for angle in next(fh).split())
         next(fh)
         next(fh)
         if next(fh).strip() != "END":