diff --git a/extension/data_loader/mmap_data_loader.cpp b/extension/data_loader/mmap_data_loader.cpp
index af38a6d8a75..10bd2f35f5e 100644
--- a/extension/data_loader/mmap_data_loader.cpp
+++ b/extension/data_loader/mmap_data_loader.cpp
@@ -181,9 +181,9 @@ Result<FreeableBuffer> MmapDataLoader::load(
     size_t size,
     ET_UNUSED const DataLoader::SegmentInfo& segment_info) const {
   // Ensure read range is valid.
-  auto err = validate_input(offset, size);
-  if (err != Error::Ok) {
-    return err;
+  auto validation_err = validate_input(offset, size);
+  if (validation_err != Error::Ok) {
+    return validation_err;
   }
 
   // mmap() will fail if the size is zero.