diff --git a/cores/esp32/HardwareSerial.cpp b/cores/esp32/HardwareSerial.cpp
index f7d6ea7619f..58f740b14c0 100644
--- a/cores/esp32/HardwareSerial.cpp
+++ b/cores/esp32/HardwareSerial.cpp
@@ -64,7 +64,7 @@ void serialEvent(void) {}
 #elif CONFIG_IDF_TARGET_ESP32S3
 #define RX1 15
 #elif CONFIG_IDF_TARGET_ESP32C6
-#define RX1 5
+#define RX1 4
 #elif CONFIG_IDF_TARGET_ESP32H2
 #define RX1 0
 #endif
@@ -80,7 +80,7 @@ void serialEvent(void) {}
 #elif CONFIG_IDF_TARGET_ESP32S3
 #define TX1 16
 #elif CONFIG_IDF_TARGET_ESP32C6
-#define TX1 4
+#define TX1 5
 #elif CONFIG_IDF_TARGET_ESP32H2
 #define TX1 1
 #endif