diff --git a/torchquantum/pulse/hardware/hardware.py b/torchquantum/pulse/hardware/hardware.py
index db3e6b0b..76e78bf5 100644
--- a/torchquantum/pulse/hardware/hardware.py
+++ b/torchquantum/pulse/hardware/hardware.py
@@ -6,6 +6,6 @@
 
 
 
-class Hardware(torch.nn.Modele):
+class Hardware(torch.nn.Module):
     def __init__(self):
         pass