diff --git a/openmc/deplete/nuclide.py b/openmc/deplete/nuclide.py
index d637edcfa5..7b6ddd7884 100644
--- a/openmc/deplete/nuclide.py
+++ b/openmc/deplete/nuclide.py
@@ -124,9 +124,8 @@ class Nuclide:
         self._yield_data = None
 
     def __repr__(self):
-        return "<Nuclide: {} ({} modes, {} reactions)>".format(
-            self.name, self.n_decay_modes, self.n_reaction_paths
-        )
+        n_modes, n_rx = self.n_decay_modes, self.n_reaction_paths
+        return f"<Nuclide: {self.name} ({n_modes} modes, {n_rx} reactions)>"
 
     @property
     def n_decay_modes(self):