diff --git a/ldm/models/diffusion/ddpm.py b/ldm/models/diffusion/ddpm.py
index 6090212..7bd6bb6 100644
--- a/ldm/models/diffusion/ddpm.py
+++ b/ldm/models/diffusion/ddpm.py
@@ -900,6 +900,7 @@ class LatentDiffusion(DDPM):
         loss_simple = self.get_loss(model_output, target, mean=False).mean([1, 2, 3])
         loss_dict.update({f'{prefix}/loss_simple': loss_simple.mean()})
 
+        self.logvar = self.logvar.to(self.device)
         logvar_t = self.logvar[t].to(self.device)
         loss = loss_simple / torch.exp(logvar_t) + logvar_t
         # loss = loss_simple / torch.exp(self.logvar) + self.logvar