diff --git a/targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_KL82Z/pwmout_api.c b/targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_KL82Z/pwmout_api.c
index 405446e694..40ed83c4cb 100644
--- a/targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_KL82Z/pwmout_api.c
+++ b/targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_KL82Z/pwmout_api.c
@@ -36,9 +36,9 @@ void pwmout_init(pwmout_t* obj, PinName pin)
 
     uint32_t pwm_base_clock;
 
-    /* Set the TPM clock source to be IRC 48M */
+    /* Set the TPM clock source to be MCG FLL clock */
     CLOCK_SetTpmClock(1U);
-    pwm_base_clock = CLOCK_GetFreq(kCLOCK_McgIrc48MClk);
+    pwm_base_clock = CLOCK_GetFreq(kCLOCK_PllFllSelClk);
     float clkval = (float)pwm_base_clock / 1000000.0f;
     uint32_t clkdiv = 0;
     while (clkval > 1) {