diff --git a/src/cpp/ripple/uint256.h b/src/cpp/ripple/uint256.h
index 872fce531d..c00a7624ac 100644
--- a/src/cpp/ripple/uint256.h
+++ b/src/cpp/ripple/uint256.h
@@ -475,7 +475,7 @@ inline const uint256 operator|(const base_uint256& a, const uint256& b) { return
 inline bool operator==(const uint256& a, const base_uint256& b)		 { return (base_uint256)a == (base_uint256)b; }
 inline bool operator!=(const uint256& a, const base_uint256& b)		 { return (base_uint256)a != (base_uint256)b; }
 inline const uint256 operator^(const uint256& a, const base_uint256& b) { return (base_uint256)a ^  (base_uint256)b; }
-inline const uint256 operator&(const uint256& a, const base_uint256& b) { return (base_uint256)a &  (base_uint256)b; }
+inline const uint256 operator&(const uint256& a, const base_uint256& b) { return uint256(a) &= b; }
 inline const uint256 operator|(const uint256& a, const base_uint256& b) { return (base_uint256)a |  (base_uint256)b; }
 inline bool operator==(const uint256& a, const uint256& b)			  { return (base_uint256)a == (base_uint256)b; }
 inline bool operator!=(const uint256& a, const uint256& b)			  { return (base_uint256)a != (base_uint256)b; }