diff --git a/drivers/at86rf2xx/at86rf2xx_netdev.c b/drivers/at86rf2xx/at86rf2xx_netdev.c
index 80f091e6f6..74fa68a1d2 100644
--- a/drivers/at86rf2xx/at86rf2xx_netdev.c
+++ b/drivers/at86rf2xx/at86rf2xx_netdev.c
@@ -822,6 +822,7 @@ static int _rem_event_cb(gnrc_netdev_t *dev, gnrc_netdev_event_cb_t cb)
 
 static void _isr_event(gnrc_netdev_t *device, uint32_t event_type)
 {
+    (void) event_type;
     at86rf2xx_t *dev = (at86rf2xx_t *) device;
     uint8_t irq_mask;
     uint8_t state;
diff --git a/drivers/include/periph/dev_enums.h b/drivers/include/periph/dev_enums.h
index f8238913e5..53ba448a90 100644
--- a/drivers/include/periph/dev_enums.h
+++ b/drivers/include/periph/dev_enums.h
@@ -45,7 +45,7 @@ enum {
 #if TIMER_3_EN
     TIMER_3,                /**< 4th timer */
 #endif
-    TIMER_UNDEFINED,        /**< deprecated legacy undefined values */
+    TIMER_UNDEFINED         /**< deprecated legacy undefined values */
 };
 
 /**
diff --git a/drivers/include/periph/gpio.h b/drivers/include/periph/gpio.h
index cef16f3020..d6385ddc49 100644
--- a/drivers/include/periph/gpio.h
+++ b/drivers/include/periph/gpio.h
@@ -57,7 +57,7 @@ typedef int gpio_t;
 #ifndef HAVE_GPIO_DIR_T
 typedef enum {
     GPIO_DIR_IN = 0,        /**< configure pin as input */
-    GPIO_DIR_OUT = 1,       /**< configure pin as output */
+    GPIO_DIR_OUT = 1        /**< configure pin as output */
 } gpio_dir_t;
 #endif
 
diff --git a/drivers/periph_common/spi.c b/drivers/periph_common/spi.c
index b8799f7569..dded709841 100644
--- a/drivers/periph_common/spi.c
+++ b/drivers/periph_common/spi.c
@@ -29,7 +29,8 @@
 #ifdef PERIPH_SPI_NEEDS_TRANSFER_BYTES
 int spi_transfer_bytes(spi_t dev, char *out, char *in, unsigned int length)
 {
-    int trans_ret, trans_bytes = 0;
+    int trans_ret;
+    unsigned trans_bytes = 0;
     char in_temp;
 
     for (trans_bytes = 0; trans_bytes < length; trans_bytes++) {