diff --git a/Adafruit_SPIDevice.cpp b/Adafruit_SPIDevice.cpp
index 1b6b3bf..975e31f 100644
--- a/Adafruit_SPIDevice.cpp
+++ b/Adafruit_SPIDevice.cpp
@@ -70,6 +70,16 @@ Adafruit_SPIDevice::Adafruit_SPIDevice(int8_t cspin, int8_t sckpin,
   _spi = NULL;
 }
 
+/*!
+ *    @brief  Release memory allocated in constructors
+ */
+Adafruit_SPIDevice::~Adafruit_SPIDevice() {
+  if (_spiSetting) {
+    delete _spiSetting;
+    _spiSetting = nullptr;
+  }
+}
+
 /*!
  *    @brief  Initializes SPI bus and sets CS pin high
  *    @return Always returns true because there's no way to test success of SPI
diff --git a/Adafruit_SPIDevice.h b/Adafruit_SPIDevice.h
index 55a2d70..b96f86b 100644
--- a/Adafruit_SPIDevice.h
+++ b/Adafruit_SPIDevice.h
@@ -66,6 +66,7 @@ public:
                      uint32_t freq = 1000000,
                      BitOrder dataOrder = SPI_BITORDER_MSBFIRST,
                      uint8_t dataMode = SPI_MODE0);
+  ~Adafruit_SPIDevice();
 
   bool begin(void);
   bool read(uint8_t *buffer, size_t len, uint8_t sendvalue = 0xFF);