diff --git a/platform/mcu/MK22FN512xxx12/drivers/delays.c b/platform/mcu/MK22FN512xxx12/drivers/delays.c
index cb6e1a48..07e69cea 100644
--- a/platform/mcu/MK22FN512xxx12/drivers/delays.c
+++ b/platform/mcu/MK22FN512xxx12/drivers/delays.c
@@ -25,7 +25,7 @@ void delayUs(unsigned int useconds)
 {
     // This delay has been calibrated to take x microseconds
     // It is written in assembler to be independent on compiler optimization
-    asm volatile("           mov   r1, #42    \n"
+    asm volatile("           mov   r1, #24    \n"
                  "           mul   r2, %0, r1 \n"
                  "           mov   r1, #0     \n"
                  "___loop_u: cmp   r1, r2     \n"
@@ -36,7 +36,7 @@ void delayUs(unsigned int useconds)
 
 void delayMs(unsigned int mseconds)
 {
-    register const unsigned int count=42000;
+    register const unsigned int count=30000;
 
     for(unsigned int i=0;i<mseconds;i++)
     {