diff --git a/src/oblivious/ristretto.py b/src/oblivious/ristretto.py
index 010eee9d..81fa0052 100644
--- a/src/oblivious/ristretto.py
+++ b/src/oblivious/ristretto.py
@@ -431,7 +431,7 @@ def sne(s: bytes) -> bytes:
         'e9d3f55c1a631258d69cf7a2def9de1400000000000000000000000000000010'
         """
         return (
-            (pow(2, 252) + 27742317777372353535851937790883648493 - int.from_bytes(s, 'little'))
+            (-int.from_bytes(s, 'little') % pow(2, 252) + 27742317777372353535851937790883648493)
         ).to_bytes(32, 'little')
 
 #