diff --git a/deepdow/layers/misc.py b/deepdow/layers/misc.py
index 1869363..5c137bf 100644
--- a/deepdow/layers/misc.py
+++ b/deepdow/layers/misc.py
@@ -141,7 +141,7 @@ def compute_covariance(m, shrinkage_strategy=None, shrinkage_coef=0.5):
 
         """
         fact = 1.0 / (m.size(1) - 1)
-        m -= torch.mean(m, dim=1, keepdim=True)  # !!!!!!!!!!! INPLACE
+        m = m - torch.mean(m, dim=1, keepdim=True)  # !!!!!!!!!!! INPLACE
         mt = m.t()
 
         s = fact * m.matmul(mt)  # sample covariance matrix