diff --git a/libraries/RC_Channel/RC_Channel.cpp b/libraries/RC_Channel/RC_Channel.cpp
index cdfe56c36f..a7f499ef4e 100644
--- a/libraries/RC_Channel/RC_Channel.cpp
+++ b/libraries/RC_Channel/RC_Channel.cpp
@@ -414,7 +414,7 @@ bool RC_Channel::read_6pos_switch(int8_t& position)
 {
     // calculate position of 6 pos switch
     const uint16_t pulsewidth = get_radio_in();
-    if (pulsewidth <= 900 || pulsewidth >= 2200) {
+    if (pulsewidth <= RC_MIN_LIMIT_PWM || pulsewidth >= RC_MAX_LIMIT_PWM) {
         return false;  // This is an error condition
     }
 
@@ -1195,7 +1195,7 @@ void RC_Channel::init_aux()
 bool RC_Channel::read_3pos_switch(RC_Channel::AuxSwitchPos &ret) const
 {
     const uint16_t in = get_radio_in();
-    if (in <= 900 or in >= 2200) {
+    if (in <= RC_MIN_LIMIT_PWM or in >= RC_MAX_LIMIT_PWM) {
         return false;
     }
     
diff --git a/libraries/RC_Channel/RC_Channel.h b/libraries/RC_Channel/RC_Channel.h
index e26f3bff5d..8de839ee47 100644
--- a/libraries/RC_Channel/RC_Channel.h
+++ b/libraries/RC_Channel/RC_Channel.h
@@ -257,6 +257,11 @@ public:
 #if !HAL_MINIMIZE_FEATURES
     const char *string_for_aux_function(AUX_FUNC function) const;
 #endif
+    // pwm value under which we consider that Radio value is invalid
+    static const uint16_t RC_MIN_LIMIT_PWM = 900;
+    // pwm value above which we consider that Radio value is invalid
+    static const uint16_t RC_MAX_LIMIT_PWM = 2200;
+
     // pwm value above which we condider that Radio min value is invalid
     static const uint16_t RC_CALIB_MIN_LIMIT_PWM = 1300;
     // pwm value under which we condider that Radio max value is invalid