diff --git a/boards/arduino-atmega-common/Makefile.include b/boards/arduino-atmega-common/Makefile.include
index 12362abad733201c8ca9ccfbf1d44cac9dd063c1..3c8ed3399044467e8abac0a443940ece1aec973c 100644
--- a/boards/arduino-atmega-common/Makefile.include
+++ b/boards/arduino-atmega-common/Makefile.include
@@ -3,7 +3,7 @@ include $(RIOTBOARD)/arduino-atmega-common/Makefile.dep
 
 INCLUDES += -I$(RIOTBOARD)/arduino-atmega-common/include
 
-# refine serial port information
+# refine serial port information
 export BAUD ?= 9600
 include $(RIOTMAKE)/tools/serial.inc.mk
 
diff --git a/cpu/cc2538/include/periph_cpu.h b/cpu/cc2538/include/periph_cpu.h
index 435438ee73d2fb8414c39de03d55fb1c4eafd0da..60ab4aea29b354934d72044bcfae93d30574307b 100644
--- a/cpu/cc2538/include/periph_cpu.h
+++ b/cpu/cc2538/include/periph_cpu.h
@@ -247,7 +247,7 @@ typedef enum {
     ADC_RES_14BIT =             (0xc00),    /**< not supported by hardware */
     ADC_RES_16BIT =             (0xd00),    /**< not supported by hardware */
 } adc_res_t;
-/** @} */
+/** @} */
 
 /**
  * @brief ADC configuration wrapper
diff --git a/cpu/kinetis_common/doc.txt b/cpu/kinetis_common/doc.txt
index c68c15e1c73d742b3ace3dee26d6806da50586e7..0eddb153120f868e658c9a4e5360392e5a1dfb64 100644
--- a/cpu/kinetis_common/doc.txt
+++ b/cpu/kinetis_common/doc.txt
@@ -9,7 +9,7 @@
  * @ingroup     cpu_kinetis_common
  * @brief       ADC driver
  *
- *              ### ADC configuration example (for periph_conf.h) ###
+ *              ### ADC configuration example (for periph_conf.h) ###
  *
  *                  static const adc_conf_t adc_config[] = {
  *                      { .dev = ADC0, .pin = GPIO_UNDEF          , .chan =  0 }, // ADC0_DP0
@@ -47,7 +47,7 @@
  * @ingroup     cpu_kinetis_common
  * @brief       I2C driver
  *
- *              ### I2C configuration example (for periph_conf.h) ###
+ *              ### I2C configuration example (for periph_conf.h) ###
  *
  *                  #define I2C_NUMOF               (1U)
  *                  #define I2C_0_EN                1
@@ -85,7 +85,7 @@
  * @ingroup     cpu_kinetis_common
  * @brief       PWM driver
  *
- *              ### PWM configuration example (for periph_conf.h) ###
+ *              ### PWM configuration example (for periph_conf.h) ###
  *
  *                  #define PWM_NUMOF           (1U)
  *                  #define PWM_0_EN            1
@@ -118,7 +118,7 @@
  *              looks random. Reference Manual recommends to use the RNGA as entropy
  *              source.
  *
- *              ### RNGA configuration example (for periph_conf.h) ###
+ *              ### RNGA configuration example (for periph_conf.h) ###
  *
  *                  #define RANDOM_NUMOF         (1U)
  *                  #define KINETIS_RNGA         RNG
@@ -134,7 +134,7 @@
  *              looks random. Reference Manual recommends to use the RNGB as entropy
  *              source.
  *
- *              ### RNGB configuration example (for periph_conf.h) ###
+ *              ### RNGB configuration example (for periph_conf.h) ###
  *
  *                  #define RANDOM_NUMOF         (1U)
  *                  #define KINETIS_RNGB         RNG
@@ -155,7 +155,7 @@
  *              The driver supports alarm, it is stored in the
  *              Time Alarm Registers (TAR) and the unit is seconds.
  *
- *              ### RTC configuration example (for periph_conf.h) ###
+ *              ### RTC configuration example (for periph_conf.h) ###
  *
  *                  #define RTC_NUMOF           (1U)
  *                  #define RTC_DEV             RTC
@@ -200,7 +200,7 @@
  *              extra delays in the transfer because of the additional overhead
  *              of calling gpio_set/clear at every transfer.
  *
- *              ### SPI configuration example (for periph_conf.h): ###
+ *              ### SPI configuration example (for periph_conf.h): ###
  *
  *                  static const uint32_t spi_clk_config[] = {
  *                      // Use cpu/kinetis_common/dist/calc_spi_scalers to
@@ -260,7 +260,7 @@
  *              caused by mixing the clock domains of the bus clock used by the
  *              CPU and the 32kHz reference clock for the LPTMR counter.
  *
- *              ### Timer configuration example (for periph_conf.h) ###
+ *              ### Timer configuration example (for periph_conf.h) ###
  *
  *                  #define PIT_NUMOF               (2U)
  *                  #define PIT_CONFIG {                 \
@@ -299,7 +299,7 @@
  *              using the BRFA field in the UART C4 register.
  *              Currently, only the base TX/RX functionality is available.
  *
- *              ### UART configuration example (for periph_conf.h) ###
+ *              ### UART configuration example (for periph_conf.h) ###
  *
  *                  static const uart_conf_t uart_config[] = {
  *                      {
diff --git a/sys/cpp11-compat/include/riot/thread.hpp b/sys/cpp11-compat/include/riot/thread.hpp
index a9b1323dc61a0b8829f51a16794cfece6424188b..219167268ee131c198863a83233032424a923ef0 100644
--- a/sys/cpp11-compat/include/riot/thread.hpp
+++ b/sys/cpp11-compat/include/riot/thread.hpp
@@ -76,7 +76,7 @@ struct thread_data {
  */
 struct thread_data_deleter {
   /**
-   * @brief Called by the deleter of a thread object to manage the lifetime of
+   * @brief Called by the deleter of a thread object to manage the lifetime of
    *        the thread internal management data.
    */
   void operator()(thread_data* ptr) {
diff --git a/sys/posix/pthread/include/pthread_mutex.h b/sys/posix/pthread/include/pthread_mutex.h
index 66dea47a77f08083a09e606ff7ae96a585700ba5..6e2eb40660993acc446d1d3aa01c0393e44644a0 100644
--- a/sys/posix/pthread/include/pthread_mutex.h
+++ b/sys/posix/pthread/include/pthread_mutex.h
@@ -44,7 +44,7 @@ int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *mutexa
 /**
  * @brief           Destroy a mutex.
  * @details         This is currently a no-op.
- *                  Destroying a mutex locked is undefined behavior.
+ *                  Destroying a mutex locked is undefined behavior.
  * @param[in,out]   mutex   Datum to destroy.
  * @returns         0, this invocation is a no-op that cannot fail.
  */