diff --git a/shell_encryption/multi_party/public_key.h b/shell_encryption/multi_party/public_key.h
index 2108b42..bbf008e 100644
--- a/shell_encryption/multi_party/public_key.h
+++ b/shell_encryption/multi_party/public_key.h
@@ -160,7 +160,6 @@ absl::Status PublicKey<ModularInt>::EncryptExplicit(
 
   // Encode message into a plaintext polynomial.
   auto moduli = public_parameter_->Moduli();
-  Integer t = encoder->PlaintextModulus();
   RLWE_ASSIGN_OR_RETURN(RnsPolynomial<ModularInt> plaintext,
                         encoder->EncodeBfv(messages, moduli));
   if (!plaintext.IsNttForm()) {
diff --git a/shell_encryption/rns/rns_polynomial.h b/shell_encryption/rns/rns_polynomial.h
index 7173a4b..db642d6 100644
--- a/shell_encryption/rns/rns_polynomial.h
+++ b/shell_encryption/rns/rns_polynomial.h
@@ -151,7 +151,7 @@ class RnsPolynomial {
   absl::StatusOr<RnsPolynomial> Negate(
       absl::Span<const PrimeModulus<ModularInt>* const> moduli) const {
     RnsPolynomial output = *this;
-    output.NegateInPlace(moduli);
+    RLWE_RETURN_IF_ERROR(output.NegateInPlace(moduli));
     return output;
   }