diff --git a/inc/llcc68_definitions.hpp b/inc/llcc68_definitions.hpp
index 98d94d2..12e4767 100644
--- a/inc/llcc68_definitions.hpp
+++ b/inc/llcc68_definitions.hpp
@@ -27,7 +27,7 @@ enum LoRaBandwidth : uint8_t {
 	BW_500_0 = 0x06,
 };
 
-inline const char *bw_to_string(const LoRaBandwidth &bw) {
+inline const char *to_str(LoRaBandwidth bw) {
 	switch (bw) {
 	case LoRaBandwidth::BW_7_8:
 		return "7.8kHz";
@@ -61,7 +61,7 @@ enum LoRaCodingRate : uint8_t {
 	CR_4_8 = 0x04,
 };
 
-inline const char *cr_to_string(const LoRaCodingRate &cr) {
+inline const char *to_str(LoRaCodingRate cr) {
 	switch (cr) {
 	case LoRaCodingRate::CR_4_5:
 		return "4/5";
@@ -114,9 +114,9 @@ struct modulation_params_t {
 	[[nodiscard]]
 	auto to_string() const -> std::string {
 		return std::format("mod_params: bw={}, sf={}, cr={}, ldr_optimize={}",
-						   bw_to_string(static_cast<LoRaBandwidth>(bw)),
+						   to_str(static_cast<LoRaBandwidth>(bw)),
 						   sf,
-						   cr_to_string(static_cast<LoRaCodingRate>(cr)),
+						   to_str(static_cast<LoRaCodingRate>(cr)),
 						   ldr_optimize ? "ON" : "OFF");
 	}
 };