diff --git a/src/io/parquet/read/mod.rs b/src/io/parquet/read/mod.rs
index c9f84612757..f868b4293ff 100644
--- a/src/io/parquet/read/mod.rs
+++ b/src/io/parquet/read/mod.rs
@@ -87,5 +87,5 @@ fn convert_i256(value: &[u8], n: usize) -> i256 {
     let mut bytes = [0u8; 32];
     bytes[..n].copy_from_slice(value);
 
-    i256::from_be_bytes(bytes)
+    i256(i256::from_be_bytes(bytes).0 >> (8*(32-n)))
 }