diff --git a/classifier/nn_ff.py b/classifier/nn_ff.py
index f478f1d..3ccda08 100644
--- a/classifier/nn_ff.py
+++ b/classifier/nn_ff.py
@@ -58,7 +58,7 @@ class FeedForward(torch.nn.Module):
         self.samples1 = samples1
         self.samples2 = samples2
 
-        model.eval()  # put into eval mode
+        self.eval()  # put into eval mode
 
         # initialize training data
         self.shuffle()
@@ -79,7 +79,7 @@ class FeedForward(torch.nn.Module):
                 self.optimizer.zero_grad()
 
                 # forward pass
-                y_pred = model(X_train[a:b])
+                y_pred = self.forward(self.X_train[a:b])
                 loss = self.criterion(y_pred, self.y_train[a:b])
 
                 # backward pass