diff --git a/ports/espressif/boards/m5stack_core2/board.c b/ports/espressif/boards/m5stack_core2/board.c
index ea0d0a1a7d..a2565229ce 100644
--- a/ports/espressif/boards/m5stack_core2/board.c
+++ b/ports/espressif/boards/m5stack_core2/board.c
@@ -99,12 +99,12 @@ static bool pmic_set_power_source(uint8_t source, busio_i2c_obj_t *i2c) {
 
             #if M5STACK_CORE2_5V_OUTPUT_ENABLE_DEFAULT
             // Set EXTENT output high to enable 5V power boost
-            write_buf[0] = AXP192_EXTEN_DCDC2_CTRL;
+            write_buf[0] = AXP192_DCDC13_LDO23_CTRL;
             rc = common_hal_busio_i2c_write_read(i2c, AXP192_I2C_ADDRESS, write_buf, 1, read_buf, sizeof(read_buf));
             if (rc != 0) {
                 return false;
             }
-            write_buf[1] = read_buf[0] | AXP192_EXTEN_DCDC2_CTRL_EXTEN;
+            write_buf[1] = read_buf[0] | AXP192_DCDC13_LDO23_CTRL_EXTEN;
             rc = common_hal_busio_i2c_write(i2c, AXP192_I2C_ADDRESS, write_buf, sizeof(write_buf));
             if (rc != 0) {
                 return false;
@@ -139,12 +139,12 @@ static bool pmic_set_power_source(uint8_t source, busio_i2c_obj_t *i2c) {
             }
 
             // Set EXTENT output low to disable 5V power boost
-            write_buf[0] = AXP192_EXTEN_DCDC2_CTRL;
+            write_buf[0] = AXP192_DCDC13_LDO23_CTRL;
             rc = common_hal_busio_i2c_write_read(i2c, AXP192_I2C_ADDRESS, write_buf, 1, read_buf, sizeof(read_buf));
             if (rc != 0) {
                 return false;
             }
-            write_buf[1] = read_buf[0] & ~AXP192_EXTEN_DCDC2_CTRL_EXTEN;
+            write_buf[1] = read_buf[0] & ~AXP192_DCDC13_LDO23_CTRL_EXTEN;
             rc = common_hal_busio_i2c_write(i2c, AXP192_I2C_ADDRESS, write_buf, sizeof(write_buf));
             if (rc != 0) {
                 return false;
diff --git a/ports/espressif/pmic/axp192/axp192.h b/ports/espressif/pmic/axp192/axp192.h
index 65eb712b1a..587ce04b0c 100755
--- a/ports/espressif/pmic/axp192/axp192.h
+++ b/ports/espressif/pmic/axp192/axp192.h
@@ -42,14 +42,11 @@
 #define AXP192_INPUT_POWER_STATE_ACIN_VBUS_PCB_SHORTED  0b00000010
 #define AXP192_INPUT_POWER_STATE_BOOT_SOURCE_ACIN_OR_VBUS  0b00000001
 
-#define AXP192_EXTEN_DCDC2_CTRL 0x10
-#define AXP192_EXTEN_DCDC2_CTRL_EXTEN 0b00000100
-#define AXP192_EXTEN_DCDC2_CTRL_DCDC2 0b00000001
-
 #define AXP192_DCDC13_LDO23_CTRL 0x12
 #define AXP192_DCDC13_LDO23_CTRL_EXTEN 0b01000000
-#define AXP192_DCDC13_LDO23_CTRL_LDO3 0b00001000
-#define AXP192_DCDC13_LDO23_CTRL_LDO2 0b00000100
+#define AXP192_DCDC13_LDO23_CTRL_DCDC2 0b00010000
+#define AXP192_DCDC13_LDO23_CTRL_LDO3  0b00001000
+#define AXP192_DCDC13_LDO23_CTRL_LDO2  0b00000100
 #define AXP192_DCDC13_LDO23_CTRL_DCDC3 0b00000010
 #define AXP192_DCDC13_LDO23_CTRL_DCDC1 0b00000001