diff --git a/src/libhictk/balancing/include/hictk/balancing/ice.hpp b/src/libhictk/balancing/include/hictk/balancing/ice.hpp
index ce492da6a..021745e0c 100644
--- a/src/libhictk/balancing/include/hictk/balancing/ice.hpp
+++ b/src/libhictk/balancing/include/hictk/balancing/ice.hpp
@@ -139,18 +139,18 @@ class ICE {
   static void min_count_filtering(nonstd::span<double> biases, std::size_t min_count,
                                   nonstd::span<const double> marg);
 
-  static void mad_max_filtering(nonstd::span<const std::size_t> chrom_offsets,
+  static void mad_max_filtering(nonstd::span<const std::uint64_t> chrom_offsets,
                                 nonstd::span<double> biases, nonstd::span<double> marg,
                                 double mad_max);
 
   template <typename MatrixT>
   static void initialize_biases(const MatrixT& matrix, nonstd::span<double> biases,
-                                nonstd::span<const std::size_t> chrom_bin_offsets,
+                                nonstd::span<const std::uint64_t> chrom_bin_offsets,
                                 std::size_t min_nnz, std::size_t min_count, double mad_max,
                                 BS::thread_pool* tpool);
 
   [[nodiscard]] static std::vector<double> compute_weights_from_chromosome_sizes(
-      const BinTable& bins, nonstd::span<std::size_t> chrom_bin_offsets);
+      const BinTable& bins, nonstd::span<std::uint64_t> chrom_bin_offsets);
 };
 
 }  // namespace hictk::balancing
diff --git a/src/libhictk/balancing/include/hictk/balancing/impl/ice_impl.hpp b/src/libhictk/balancing/include/hictk/balancing/impl/ice_impl.hpp
index db036cb40..408cbeadc 100644
--- a/src/libhictk/balancing/include/hictk/balancing/impl/ice_impl.hpp
+++ b/src/libhictk/balancing/include/hictk/balancing/impl/ice_impl.hpp
@@ -421,7 +421,7 @@ inline void ICE::min_count_filtering(nonstd::span<double> biases, std::size_t mi
   }
 }
 
-inline void ICE::mad_max_filtering(nonstd::span<const std::size_t> chrom_offsets,
+inline void ICE::mad_max_filtering(nonstd::span<const std::uint64_t> chrom_offsets,
                                    nonstd::span<double> biases, nonstd::span<double> marg,
                                    double mad_max) {
   auto median = [](auto v) {
@@ -601,7 +601,7 @@ inline double ICE::compute_ssq_nzmarg(nonstd::span<const double> marg, double av
 
 template <typename MatrixT>
 inline void ICE::initialize_biases(const MatrixT& matrix, nonstd::span<double> biases,
-                                   nonstd::span<const std::size_t> chrom_bin_offsets,
+                                   nonstd::span<const std::uint64_t> chrom_bin_offsets,
                                    std::size_t min_nnz, std::size_t min_count, double mad_max,
                                    BS::thread_pool* tpool) {
   if (min_nnz == 0 && min_count == 0 && mad_max == 0) {
@@ -631,7 +631,7 @@ inline void ICE::initialize_biases(const MatrixT& matrix, nonstd::span<double> b
 }
 
 inline std::vector<double> ICE::compute_weights_from_chromosome_sizes(
-    const BinTable& bins, nonstd::span<std::size_t> chrom_bin_offsets) {
+    const BinTable& bins, nonstd::span<std::uint64_t> chrom_bin_offsets) {
   std::vector<double> weights(bins.size());
   for (std::uint32_t i = 1; i < chrom_bin_offsets.size(); ++i) {
     const auto& chrom = bins.chromosomes().at(i - 1);
diff --git a/src/libhictk/balancing/include/hictk/balancing/impl/sparse_matrix_impl.hpp b/src/libhictk/balancing/include/hictk/balancing/impl/sparse_matrix_impl.hpp
index 412b84407..1cc20a7bf 100644
--- a/src/libhictk/balancing/include/hictk/balancing/impl/sparse_matrix_impl.hpp
+++ b/src/libhictk/balancing/include/hictk/balancing/impl/sparse_matrix_impl.hpp
@@ -80,7 +80,7 @@ constexpr std::size_t MargsVector::compute_number_of_mutexes(std::size_t size) n
 }
 
 template <typename I, typename>
-constexpr I MargsVector::next_pow2(I n) noexcept {
+inline I MargsVector::next_pow2(I n) noexcept {
   using ull = unsigned long long;
   if constexpr (std::is_signed_v<I>) {
     assert(n >= 0);
diff --git a/src/libhictk/balancing/include/hictk/balancing/sparse_matrix.hpp b/src/libhictk/balancing/include/hictk/balancing/sparse_matrix.hpp
index 2f150ddc6..4a00fb912 100644
--- a/src/libhictk/balancing/include/hictk/balancing/sparse_matrix.hpp
+++ b/src/libhictk/balancing/include/hictk/balancing/sparse_matrix.hpp
@@ -62,7 +62,7 @@ class MargsVector {
  private:
   static constexpr std::size_t compute_number_of_mutexes(std::size_t size) noexcept;
   template <typename I, typename = std::enable_if_t<std::is_integral_v<I>>>
-  [[nodiscard]] static constexpr I next_pow2(I n) noexcept;
+  [[nodiscard]] static I next_pow2(I n) noexcept;
   [[nodiscard]] std::size_t get_mutex_idx(std::size_t i) const noexcept;
 };