diff --git a/timm/models/resnetv2.py b/timm/models/resnetv2.py
index 80e0943d..9c332235 100644
--- a/timm/models/resnetv2.py
+++ b/timm/models/resnetv2.py
@@ -365,6 +365,7 @@ class ResNetV2(nn.Module):
         return self.head.fc
 
     def reset_classifier(self, num_classes, global_pool='avg'):
+        self.num_classes = num_classes
         self.head = ClassifierHead(
             self.num_features, num_classes, pool_type=global_pool, drop_rate=self.drop_rate, use_conv=True)