diff --git a/pkg/hints/uint256_hints_test.go b/pkg/hints/uint256_hints_test.go
index 1706ebb3..2438042d 100644
--- a/pkg/hints/uint256_hints_test.go
+++ b/pkg/hints/uint256_hints_test.go
@@ -323,7 +323,7 @@ func TestUint256SqrtOk(t *testing.T) {
 				NewMaybeRelocatableFelt(FeltFromUint64(17)),
 				NewMaybeRelocatableFelt(FeltFromUint64(7)),
 			},
-			"root": {nil},
+			"root": {nil, nil},
 		},
 		vm,
 	)
diff --git a/pkg/lambdaworks/lambdaworks.go b/pkg/lambdaworks/lambdaworks.go
index ca1868c5..b8ad8ecd 100644
--- a/pkg/lambdaworks/lambdaworks.go
+++ b/pkg/lambdaworks/lambdaworks.go
@@ -397,5 +397,5 @@ func ToUint256(a *big.Int) Uint256 {
 }
 
 func (u *Uint256) IsEqual(other Uint256) bool {
-	return u.Low == other.High && u.High == other.High
+	return u.Low.Cmp(other.Low) == 0 && u.High.Cmp(other.High) == 0
 }