diff --git a/asteroid/dsp/overlap_add.py b/asteroid/dsp/overlap_add.py
index c858e6b4e..67614f341 100644
--- a/asteroid/dsp/overlap_add.py
+++ b/asteroid/dsp/overlap_add.py
@@ -112,11 +112,14 @@ def ola_forward(self, x):
                 # we determine best perm based on xcorr with previous sources
                 frame = _reorder_sources(frame, out[-1], n_src, self.window_size, self.hop_size)
 
+            out.append(frame)
+
+        # apply windowing/scaling *after* _reorder_sources has been called, inplace.
+        for frame in out:
             if self.use_window:
-                frame = frame * self.window.to(frame)
+                frame *= self.window.to(frame)
             else:
-                frame = frame / (self.window_size / self.hop_size)
-            out.append(frame)
+                frame /= self.window_size / self.hop_size
 
         out = torch.stack(out).reshape(n_chunks, batch * n_src, self.window_size)
         out = out.permute(1, 2, 0)