diff --git a/egs/librispeech/ASR/conformer_ctc/subsampling.py b/egs/librispeech/ASR/conformer_ctc/subsampling.py
index 6cc90c8a1..7c7d0ee6c 100644
--- a/egs/librispeech/ASR/conformer_ctc/subsampling.py
+++ b/egs/librispeech/ASR/conformer_ctc/subsampling.py
@@ -442,7 +442,7 @@ class ScaledLinear(nn.Linear):
 
     def _reset_parameters(self):
         std = 0.05
-        a = math.sqrt(3) * std
+        a = (3 ** 0.5) * std
         nn.init.uniform_(self.weight, -a, a)
         if self.bias is not None:
             nn.init.constant_(self.bias, 0.0)
@@ -478,7 +478,7 @@ class ScaledConv1d(nn.Conv1d):
 
     def _reset_parameters(self):
         std = 0.05
-        a = math.sqrt(3) * std
+        a = (3 ** 0.5) * std
         nn.init.uniform_(self.weight, -a, a)
         if self.bias is not None:
             nn.init.constant_(self.bias, 0.0)
@@ -520,7 +520,7 @@ class ScaledConv2d(nn.Conv2d):
 
     def _reset_parameters(self):
         std = 0.05
-        a = math.sqrt(3) * std
+        a = (3 ** 0.5) * std
         nn.init.uniform_(self.weight, -a, a)
         if self.bias is not None:
             nn.init.constant_(self.bias, 0.0)