diff --git a/speeduino/idle.cpp b/speeduino/idle.cpp
index 3b90240a..437baadb 100644
--- a/speeduino/idle.cpp
+++ b/speeduino/idle.cpp
@@ -134,7 +134,7 @@ void initialiseIdle(bool forcehoming)
 
       #if defined(CORE_AVR)
         idle_pwm_max_count = (uint16_t)(MICROS_PER_SEC / (16U * configPage6.idleFreq * 2U)); //Converts the frequency in Hz to the number of ticks (at 16uS) it takes to complete 1 cycle. Note that the frequency is divided by 2 coming from TS to allow for up to 512hz
-      #elif defined(CORE_TEENSY)
+      #elif defined(CORE_TEENSY35)
         idle_pwm_max_count = (uint16_t)(MICROS_PER_SEC / (32U * configPage6.idleFreq * 2U)); //Converts the frequency in Hz to the number of ticks (at 32uS) it takes to complete 1 cycle. Note that the frequency is divided by 2 coming from TS to allow for up to 512hz
       #elif defined(CORE_TEENSY41)
         idle_pwm_max_count = (uint16_t)(MICROS_PER_SEC / (2U * configPage6.idleFreq * 2U)); //Converts the frequency in Hz to the number of ticks (at 2uS) it takes to complete 1 cycle. Note that the frequency is divided by 2 coming from TS to allow for up to 512hz
@@ -158,7 +158,7 @@ void initialiseIdle(bool forcehoming)
 
       #if defined(CORE_AVR)
         idle_pwm_max_count = (uint16_t)(MICROS_PER_SEC / (16U * configPage6.idleFreq * 2U)); //Converts the frequency in Hz to the number of ticks (at 16uS) it takes to complete 1 cycle. Note that the frequency is divided by 2 coming from TS to allow for up to 512hz
-      #elif defined(CORE_TEENSY)
+      #elif defined(CORE_TEENSY35)
         idle_pwm_max_count = (uint16_t)(MICROS_PER_SEC / (32U * configPage6.idleFreq * 2U)); //Converts the frequency in Hz to the number of ticks (at 32uS) it takes to complete 1 cycle. Note that the frequency is divided by 2 coming from TS to allow for up to 512hz
       #elif defined(CORE_TEENSY41)
         idle_pwm_max_count = (uint16_t)(MICROS_PER_SEC / (2U * configPage6.idleFreq * 2U)); //Converts the frequency in Hz to the number of ticks (at 2uS) it takes to complete 1 cycle. Note that the frequency is divided by 2 coming from TS to allow for up to 512hz