diff --git a/comfy/rmsnorm.py b/comfy/rmsnorm.py
index 77df4446..9d82bee1 100644
--- a/comfy/rmsnorm.py
+++ b/comfy/rmsnorm.py
@@ -49,6 +49,7 @@ if RMSNorm is None:
                 )
             else:
                 self.register_parameter("weight", None)
+            self.bias = None
 
         def forward(self, x):
             return rms_norm(x, self.weight, self.eps)