diff --git a/components/drivers/cputime/cputime_cortexm.c b/components/drivers/cputime/cputime_cortexm.c
index 071acfe9bb6ce342c66f38c92b365b6a9d39efa3..48ccfdb1264da42a719e80dad53340285047fdc9 100644
--- a/components/drivers/cputime/cputime_cortexm.c
+++ b/components/drivers/cputime/cputime_cortexm.c
@@ -24,7 +24,7 @@ static float cortexm_cputime_getres(void)
     return ret;
 }
 
-static uint32_t cortexm_cputime_gettime(void)
+static uint64_t cortexm_cputime_gettime(void)
 {
     return DWT->CYCCNT;
 }