diff --git a/cirro/sdk/dataset.py b/cirro/sdk/dataset.py
index 8320a81..21495f6 100644
--- a/cirro/sdk/dataset.py
+++ b/cirro/sdk/dataset.py
@@ -630,7 +630,7 @@ def update_samplesheet(self,
             samplesheet_contents = Path(file_path).expanduser().read_text()
 
         # Validate samplesheet
-        file_names = [f.file_name for f in self.list_files()]
+        file_names = [f.name.removeprefix('data/') for f in self.list_files()]
         request = ValidateFileRequirementsRequest(
             file_names=file_names,
             sample_sheet=samplesheet_contents,