diff --git a/components/panasonic_heatpump/panasonic_heatpump.cpp b/components/panasonic_heatpump/panasonic_heatpump.cpp
index acec113..01dfff7 100644
--- a/components/panasonic_heatpump/panasonic_heatpump.cpp
+++ b/components/panasonic_heatpump/panasonic_heatpump.cpp
@@ -140,7 +140,7 @@ void PanasonicHeatpumpComponent::read_response() {
     if (this->response_message_.size() == 3 && byte_ != 0x01 && byte_ != 0x10) {
       this->response_receiving_ = false;
       ESP_LOGW(TAG, "Invalid response message: 0x%s. Expected last byte to be 0x01 or 0x10",
-               PanasonicHelpers::byte_array_to_hex_string(this->response_message_, ','));
+               PanasonicHelpers::byte_array_to_hex_string(this->response_message_, ',').c_str());
       delay(10);  // NOLINT
       continue;
     }
@@ -148,7 +148,7 @@ void PanasonicHeatpumpComponent::read_response() {
     if (this->response_message_.size() == 4 && byte_ != 0x10 && byte_ != 0x21) {
       this->response_receiving_ = false;
       ESP_LOGW(TAG, "Invalid response message: 0x%s. Expected last byte to be 0x10 or 0x21",
-               PanasonicHelpers::byte_array_to_hex_string(this->response_message_, ','));
+               PanasonicHelpers::byte_array_to_hex_string(this->response_message_, ',').c_str());
       delay(10);  // NOLINT
       continue;
     }
@@ -225,7 +225,7 @@ void PanasonicHeatpumpComponent::read_request() {
     if (this->request_message_.size() == 3 && byte_ != 0x01 && byte_ != 0x10) {
       this->request_receiving_ = false;
       ESP_LOGW(TAG, "Invalid request message: 0x%s. Expected last byte to be 0x01 or 0x10",
-               PanasonicHelpers::byte_array_to_hex_string(this->request_message_, ','));
+               PanasonicHelpers::byte_array_to_hex_string(this->request_message_, ',').c_str());
       delay(10);  // NOLINT
       continue;
     }
@@ -233,7 +233,7 @@ void PanasonicHeatpumpComponent::read_request() {
     if (this->request_message_.size() == 4 && byte_ != 0x10 && byte_ != 0x21) {
       this->request_receiving_ = false;
       ESP_LOGW(TAG, "Invalid request message: 0x%s. Expected last byte to be 0x10 or 0x21",
-               PanasonicHelpers::byte_array_to_hex_string(this->request_message_, ','));
+               PanasonicHelpers::byte_array_to_hex_string(this->request_message_, ',').c_str());
       delay(10);  // NOLINT
       continue;
     }