2 files changed, 2 insertions, 2 deletions
diff --git a/src/lib/math/numbertheory/make_prm.cpp b/src/lib/math/numbertheory/make_prm.cpp
index 3d82adf06..acd187063 100644
--- a/src/lib/math/numbertheory/make_prm.cpp
+++ b/src/lib/math/numbertheory/make_prm.cpp
@@ -66,7 +66,7 @@ BigInt random_prime(RandomNumberGenerator& rng,
       secure_vector<u16bit> sieve(sieve_size);
 
       for(size_t j = 0; j != sieve.size(); ++j)
-         sieve[j] = p % PRIMES[j];
+         sieve[j] = static_cast<u16bit>(p % PRIMES[j]);
 
       size_t counter = 0;
       while(true)
diff --git a/src/lib/math/numbertheory/numthry.cpp b/src/lib/math/numbertheory/numthry.cpp
index ae2d33524..6c3d2c931 100644
--- a/src/lib/math/numbertheory/numthry.cpp
+++ b/src/lib/math/numbertheory/numthry.cpp
@@ -446,7 +446,7 @@ bool is_prime(const BigInt& n, RandomNumberGenerator& rng,
    // Fast path testing for small numbers (<= 65521)
    if(n <= PRIMES[PRIME_TABLE_SIZE-1])
       {
-      const u16bit num = n.word_at(0);
+      const u16bit num = static_cast<u16bit>(n.word_at(0));
 
       return std::binary_search(PRIMES, PRIMES + PRIME_TABLE_SIZE, num);
       }