diff --git a/utils/weight_transfer.py b/utils/weight_transfer.py
index 86d3891..6d36697 100644
--- a/utils/weight_transfer.py
+++ b/utils/weight_transfer.py
@@ -43,7 +43,7 @@ def transfer_ConvTranspose2d(m1, m2, input_index=None, output_index=None):
     assert isinstance(m1, nn.ConvTranspose2d) and isinstance(m2, nn.ConvTranspose2d)
     assert output_index is None
     p = m1.weight.data
-    if input_index is not None:
+    if input_index is None:
         q = p.abs().sum([1, 2, 3])
         _, idxs = q.topk(m2.in_channels, largest=True)
         p = p[idxs]