diff --git a/src/config.c b/src/config.c
index 12556fca3..9e88f6f30 100755
--- a/src/config.c
+++ b/src/config.c
@@ -13,7 +13,7 @@ master_t mcfg;  // master config struct with data independent from profiles
 config_t cfg;   // profile config struct
 const char rcChannelLetters[] = "AERT1234";
 
-static uint8_t EEPROM_CONF_VERSION = 48;
+static const uint8_t EEPROM_CONF_VERSION = 48;
 static uint32_t enabledSensors = 0;
 static void resetConf(void);
 
diff --git a/src/drv_pwm.c b/src/drv_pwm.c
index a03c7dfbd..4bf6e9a0d 100755
--- a/src/drv_pwm.c
+++ b/src/drv_pwm.c
@@ -74,7 +74,7 @@
 
 typedef void pwmCallbackPtr(uint8_t port, uint16_t capture);
 
-static pwmHardware_t timerHardware[] = {
+static const pwmHardware_t timerHardware[] = {
     { TIM2, GPIOA, GPIO_Pin_0, TIM_Channel_1, TIM2_IRQn, 0, },          // PWM1
     { TIM2, GPIOA, GPIO_Pin_1, TIM_Channel_2, TIM2_IRQn, 0, },          // PWM2
     { TIM2, GPIOA, GPIO_Pin_2, TIM_Channel_3, TIM2_IRQn, 0, },          // PWM3
@@ -188,7 +188,7 @@ static const uint8_t airPWM[] = {
     0xFF
 };
 
-static const uint8_t *hardwareMaps[] = {
+static const uint8_t * const hardwareMaps[] = {
     multiPWM,
     multiPPM,
     airPWM,