diff --git a/utils/fragmented_temporary_buffer.hh b/utils/fragmented_temporary_buffer.hh
index d8714563d1..1553a2bb36 100644
--- a/utils/fragmented_temporary_buffer.hh
+++ b/utils/fragmented_temporary_buffer.hh
@@ -97,13 +97,13 @@ public:
     // Creates a fragmented temporary buffer of a specified size, supplied as a parameter.
     // Max chunk size is limited to 128kb (the same limit as `bytes_stream` has).
     static fragmented_temporary_buffer allocate_to_fit(size_t data_size) {
-        constexpr size_t max_fragment_size = 128 * 1024; // 128KB
+        constexpr size_t max_fragment_size = default_fragment_size; // 128KB
 
-        const size_t fragments_count = data_size / max_fragment_size; // number of max-sized fragments
-        const size_t last_fragment_size = data_size - (fragments_count * max_fragment_size);
+        const size_t full_fragment_count = data_size / max_fragment_size; // number of max-sized fragments
+        const size_t last_fragment_size = data_size % max_fragment_size;
 
         std::vector<seastar::temporary_buffer<char>> fragments;
-        for (size_t i = 0; i < fragments_count; ++i) {
+        for (size_t i = 0; i < full_fragment_count; ++i) {
             fragments.emplace_back(seastar::temporary_buffer<char>(max_fragment_size));
         }
         fragments.emplace_back(seastar::temporary_buffer<char>(last_fragment_size));