diff --git a/port/msp432p401lp-cc256x/main.c b/port/msp432p401lp-cc256x/main.c
index 44729a065..8b516a1db 100755
--- a/port/msp432p401lp-cc256x/main.c
+++ b/port/msp432p401lp-cc256x/main.c
@@ -547,7 +547,8 @@ static void init_systick(void){
 
 static void delay_ms(uint32_t ms){
     uint32_t delay_until = systick + ms;
-    while (systick < delay_until);
+    // assumes mcu runs fast enough to check once every ms
+    while (systick != delay_until);
 }
 
 uint32_t hal_time_ms(void){