diff --git a/deepmd/pt/model/network/mlp.py b/deepmd/pt/model/network/mlp.py
index 582abf4d69..a5ac086770 100644
--- a/deepmd/pt/model/network/mlp.py
+++ b/deepmd/pt/model/network/mlp.py
@@ -32,7 +32,6 @@
 )
 from deepmd.pt.utils.env import (
     DEFAULT_PRECISION,
-    DP_DTYPE_PROMOTION_STRICT,
     PRECISION_DICT,
 )
 from deepmd.pt.utils.utils import (
@@ -201,7 +200,7 @@ def forward(
             The output.
         """
         ori_prec = xx.dtype
-        if not DP_DTYPE_PROMOTION_STRICT:
+        if not env.DP_DTYPE_PROMOTION_STRICT:
             xx = xx.to(self.prec)
         yy = (
             torch.matmul(xx, self.matrix) + self.bias
@@ -217,7 +216,7 @@ def forward(
                 yy += torch.concat([xx, xx], dim=-1)
             else:
                 yy = yy
-        if not DP_DTYPE_PROMOTION_STRICT:
+        if not env.DP_DTYPE_PROMOTION_STRICT:
             yy = yy.to(ori_prec)
         return yy