diff --git a/pina/operators.py b/pina/operators.py
index 9da4625..5ed6e93 100644
--- a/pina/operators.py
+++ b/pina/operators.py
@@ -217,13 +217,13 @@ def laplacian(output_, input_, components=None, d=None, method="std"):
                 input_.shape[0], len(components), device=output_.device
             )
             labels = [None] * len(components)
-            for idx, ci in enumerate(components):
-                result[:, idx] = scalar_laplace(output_, input_, ci, d).flatten()
-                labels[idx] = f"dd{ci}"
+            for idx, c in enumerate(components):
+                result[:, idx] = scalar_laplace(output_, input_, c, d).flatten()
+                labels[idx] = f"dd{c}"
 
         result = result.as_subclass(LabelTensor)
         result.labels = labels
-    
+
     return result