diff --git a/python/_long.py b/python/_long.py
index 2903fc67..17231ad8 100644
--- a/python/_long.py
+++ b/python/_long.py
@@ -106,6 +106,7 @@ def ulong_divmod(a: list, b: list):
 
     if len(b) == 1:
         q, r = ulong_divmodi(a, b[0])
+        r, _ = ulong_fromint(r)
         return q, r
 
     low = 0