2 files changed, 2 insertions, 2 deletions

diff --git a/src/common/hex_util.cpp b/src/common/hex_util.cpp
index e516e5bbd..5b63f9e81 100644
--- a/src/common/hex_util.cpp
+++ b/src/common/hex_util.cpp
@@ -30,7 +30,7 @@ std::vector<u8> HexStringToVector(std::string_view str, bool little_endian) {
     return out;
 }
 
-std::string HexVectorToString(std::vector<u8> vector, bool upper) {
+std::string HexVectorToString(const std::vector<u8>& vector, bool upper) {
     std::string out;
     for (u8 c : vector)
         out += fmt::format(upper ? "{:02X}" : "{:02x}", c);
diff --git a/src/common/hex_util.h b/src/common/hex_util.h
index 0b7d3592a..68f003cb6 100644
--- a/src/common/hex_util.h
+++ b/src/common/hex_util.h
@@ -30,7 +30,7 @@ std::array<u8, Size> HexStringToArray(std::string_view str) {
     return out;
 }
 
-std::string HexVectorToString(std::vector<u8> vector, bool upper = true);
+std::string HexVectorToString(const std::vector<u8>& vector, bool upper = true);
 
 template <std::size_t Size>
 std::string HexArrayToString(std::array<u8, Size> array, bool upper = true) {