diff --git a/src/qibotn/eval.py b/src/qibotn/eval.py
index 8f74770..0629c93 100644
--- a/src/qibotn/eval.py
+++ b/src/qibotn/eval.py
@@ -220,10 +220,10 @@ def reduce_result(result, comm, method="MPI", root=0):
     elif method == "NCCL":
         stream_ptr = cp.cuda.get_current_stream().ptr
         if result.dtype == cp.complex128:
-            count = result.size * 2   # complex128 has 2 float64 numbers
+            count = result.size * 2  # complex128 has 2 float64 numbers
             nccl_type = nccl.NCCL_FLOAT64
         elif result.dtype == cp.complex64:
-            count = result.size * 2   # complex64 has 2 float32 numbers
+            count = result.size * 2  # complex64 has 2 float32 numbers
             nccl_type = nccl.NCCL_FLOAT32
         else:
             raise TypeError(f"Unsupported dtype for NCCL reduce: {result.dtype}")