diff --git a/sam2/modeling/backbones/hieradet.py b/sam2/modeling/backbones/hieradet.py
index 1ae7d4c..52051ff 100644
--- a/sam2/modeling/backbones/hieradet.py
+++ b/sam2/modeling/backbones/hieradet.py
@@ -46,11 +46,8 @@ class MultiScaleAttention(nn.Module):
 
         self.dim = dim
         self.dim_out = dim_out
-
         self.num_heads = num_heads
-        head_dim = dim_out // num_heads
-        self.scale = head_dim**-0.5
-
+    
         self.q_pool = q_pool
         self.qkv = nn.Linear(dim, dim_out * 3)
         self.proj = nn.Linear(dim_out, dim_out)