diff --git a/include/dwarfs/writer/internal/cyclic_hash.h b/include/dwarfs/writer/internal/cyclic_hash.h
index 23573818..9ab16e92 100644
--- a/include/dwarfs/writer/internal/cyclic_hash.h
+++ b/include/dwarfs/writer/internal/cyclic_hash.h
@@ -56,9 +56,9 @@ class rsync_hash {
 
   static DWARFS_FORCE_INLINE constexpr uint32_t
   repeating_window(uint8_t byte, size_t length) {
-    uint16_t v = static_cast<uint16_t>(byte);
-    uint16_t a{static_cast<uint16_t>(v * length)};
-    uint16_t b{static_cast<uint16_t>(v * (length * (length + 1)) / 2)};
+    auto v = static_cast<uint16_t>(byte);
+    auto a = static_cast<uint16_t>(v * length);
+    auto b = static_cast<uint16_t>(v * (length * (length + 1)) / 2);
     return static_cast<uint32_t>(a) | (static_cast<uint32_t>(b) << 16);
   }