diff --git a/nnunetv2/dataset_conversion/Dataset021_CTAAorta.py b/nnunetv2/dataset_conversion/Dataset021_CTAAorta.py
index 3fa581f31..2649cfaa7 100644
--- a/nnunetv2/dataset_conversion/Dataset021_CTAAorta.py
+++ b/nnunetv2/dataset_conversion/Dataset021_CTAAorta.py
@@ -59,7 +59,7 @@
 
     generate_dataset_json(
         join(nnUNet_raw, target_dataset_name),
-        {0: 'CT'},
+        {0: 'CTA'},
         labels,
         len(cases),
         '.nii.gz',