diff --git a/cores/arduino/mik32/hal/peripherals/Include/mik32_hal_gpio.h b/cores/arduino/mik32/hal/peripherals/Include/mik32_hal_gpio.h
index bc3237d..4d90b46 100644
--- a/cores/arduino/mik32/hal/peripherals/Include/mik32_hal_gpio.h
+++ b/cores/arduino/mik32/hal/peripherals/Include/mik32_hal_gpio.h
@@ -36,6 +36,7 @@ extern "C" {
  */
 typedef enum __HAL_PinsTypeDef
 {
+	NOT_A_PIN  = (0 << 0),	 /**< Не выбран пин. */
 	GPIO_PIN_0 = (1 << 0),	 /**< Выбран пин 0. */
 	GPIO_PIN_1 = (1 << 1),	 /**< Выбран пин 1. */
 	GPIO_PIN_2 = (1 << 2),	 /**< Выбран пин 2. */
diff --git a/libraries/NeoPixel/src/NeoPixel.cpp b/libraries/NeoPixel/src/NeoPixel.cpp
index 11d00de..e2aabcc 100644
--- a/libraries/NeoPixel/src/NeoPixel.cpp
+++ b/libraries/NeoPixel/src/NeoPixel.cpp
@@ -65,7 +65,7 @@ static void __attribute__((noinline, section(".ram_text"))) mik32Show(GPIO_TypeD
   // not support 400khz
   if (!is800KHz) return;
   
-  if ((m_port != NULL) && (m_pin != NC))
+  if ((m_port != NULL) && (m_pin != NOT_A_PIN))
   {
     volatile uint32_t* set = &m_port->SET;
     volatile uint32_t* clr = &m_port->CLEAR;