diff --git a/variants/STM32L4xx/L433C(B-C)(T-U)_L443CC(T-U)/PeripheralPins_CYGNET.c b/variants/STM32L4xx/L433C(B-C)(T-U)_L443CC(T-U)/PeripheralPins_CYGNET.c
index 36f73b9213..f281bba8a5 100644
--- a/variants/STM32L4xx/L433C(B-C)(T-U)_L443CC(T-U)/PeripheralPins_CYGNET.c
+++ b/variants/STM32L4xx/L433C(B-C)(T-U)_L443CC(T-U)/PeripheralPins_CYGNET.c
@@ -105,7 +105,7 @@ WEAK const PinMap PinMap_TIM[] = {
   // {PA_15,      TIM2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2,   1, 0)}, // TIM2_CH1   - CHARGE_DETECT
   {PB_0,       TIM1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1,   2, 1)}, // TIM1_CH2N  - D11
   {PB_1,       TIM1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1,   3, 1)}, // TIM1_CH3N  - A4
-  // {PB_3,       TIM2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2,   2, 0)}, // TIM2_CH2   - USER_BTN
+  // {PB_3,       TIM2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2,   2, 0)}, // TIM2_CH2   - USB_DETECT
   // {PB_6,       TIM16, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF14_TIM16, 1, 1)}, // TIM16_CH1N - SCL
   {PB_8,       TIM16, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF14_TIM16, 1, 0)}, // TIM16_CH1  - D5
   // {PB_10,      TIM2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2,   3, 0)}, // TIM2_CH3   - LPUART1_VCP_RX
@@ -156,7 +156,7 @@ WEAK const PinMap PinMap_UART_RTS[] = {
   // {PA_15,     USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},  // - CHARGE_DETECT
   {PB_1,      LPUART1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_LPUART1)}, // - A4
   {PB_1_ALT1, USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},  // - A4
-  // {PB_3,      USART1,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},  // - USER_BTN
+  // {PB_3,      USART1,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},  // - USB_DETECT
   // {PB_12,     LPUART1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_LPUART1)}, // - NC
   {PB_14,     USART3,  STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},  // - D9
   {NC,        NP,      0}
@@ -204,8 +204,8 @@ WEAK const PinMap PinMap_SPI_MISO[] = {
 WEAK const PinMap PinMap_SPI_SCLK[] = {
   {PA_1,      SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)}, // - A1
   {PA_5,      SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)}, // - CK
-  // {PB_3,      SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)}, // - USER_BTN
-  // {PB_3_ALT1, SPI3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)}, // - USER_BTN
+  // {PB_3,      SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)}, // - USB_DETECT
+  // {PB_3_ALT1, SPI3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)}, // - USB_DETECT
   // {PB_10,     SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)}, // - LPUART1_VCP_RX
   {PB_13,     SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)}, // - D10
   {NC,        NP,   0}
diff --git a/variants/STM32L4xx/L433C(B-C)(T-U)_L443CC(T-U)/variant_CYGNET.cpp b/variants/STM32L4xx/L433C(B-C)(T-U)_L443CC(T-U)/variant_CYGNET.cpp
index 994d61ab0e..00c981a79f 100644
--- a/variants/STM32L4xx/L433C(B-C)(T-U)_L443CC(T-U)/variant_CYGNET.cpp
+++ b/variants/STM32L4xx/L433C(B-C)(T-U)_L443CC(T-U)/variant_CYGNET.cpp
@@ -40,13 +40,13 @@ const PinName digitalPin[] = {
   PA_13,  // 21 - SWDIO
   PA_14,  // 22 - SWCLK
   PA_15,  // 23 - CHARGE_DETECT
-  PB_3,   // 24 - USER_BTN
+  PB_3,   // 24 - USB_DETECT
   PB_5,   // 25 - MO
   PB_6,   // 26 - SCL
   PB_7,   // 27 - SDA
   PB_10,  // 28 - LPUART1_VCP_RX
   PB_11,  // 29 - LPUART1_VCP_TX
-  PC_13,  // 30 - USB_DETECT
+  PC_13,  // 30 - USER_BTN
   PC_14,  // 31 - OSC32_IN
   PC_15,  // 32 - OSC32_OUT
   PH_0,   // 33 - ENABLE_3V3
@@ -85,8 +85,8 @@ WEAK void initVariant(void)
   GPIO_InitStruct.Pull = GPIO_NOPULL;
   GPIO_InitStruct.Pin = GPIO_PIN_1;
   HAL_GPIO_Init(GPIOH, &GPIO_InitStruct); /* PH1 DISCHARGE_3V3 */
-  GPIO_InitStruct.Pin = GPIO_PIN_13;
-  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct); /* PC13 is USB_DETECT */
+  GPIO_InitStruct.Pin = GPIO_PIN_3;
+  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct); /* PB3 is USB_DETECT */
   GPIO_InitStruct.Pin = GPIO_PIN_15;
   HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); /* PA15 is CHARGE_DETECT */
   GPIO_InitStruct.Pin = GPIO_PIN_4;
diff --git a/variants/STM32L4xx/L433C(B-C)(T-U)_L443CC(T-U)/variant_CYGNET.h b/variants/STM32L4xx/L433C(B-C)(T-U)_L443CC(T-U)/variant_CYGNET.h
index 901a7bd440..bc4ff379dd 100644
--- a/variants/STM32L4xx/L433C(B-C)(T-U)_L443CC(T-U)/variant_CYGNET.h
+++ b/variants/STM32L4xx/L433C(B-C)(T-U)_L443CC(T-U)/variant_CYGNET.h
@@ -45,13 +45,13 @@
 #define PA13                    21      // SWDIO
 #define PA14                    22      // SWCLK
 #define PA15                    23      // CHARGE_DETECT
-#define PB3                     24      // USER_BTN
+#define PB3                     24      // USB_DETECT
 #define PB5                     25      // MO
 #define PB6                     26      // SCL
 #define PB7                     27      // SDA
 #define PB10                    28      // LPUART1_VCP_RX
 #define PB11                    29      // LPUART1_VCP_TX
-#define PC13                    30      // USB_DETECT
+#define PC13                    30      // USER_BTN
 #define PC14                    31      // OSC32_IN
 #define PC15                    32      // OSC32_OUT
 #define PH0                     33      // ENABLE_3V3
@@ -83,7 +83,7 @@
 
 // On-board user button
 #ifndef USER_BTN
-  #define USER_BTN              PB3
+  #define USER_BTN              PC13
 #endif
 
 // Power switch ENABLE and DISCHARGE pins