diff --git a/examples/stm32/f4/stm32f4-discovery/tick_blink/tick_blink.c b/examples/stm32/f4/stm32f4-discovery/tick_blink/tick_blink.c
index 62238fd..973040e 100644
--- a/examples/stm32/f4/stm32f4-discovery/tick_blink/tick_blink.c
+++ b/examples/stm32/f4/stm32f4-discovery/tick_blink/tick_blink.c
@@ -42,7 +42,7 @@ void sys_tick_handler(void)
 static void msleep(uint32_t delay)
 {
 	uint32_t wake = system_millis + delay;
-	while (wake > system_millis;
+	while (wake > system_millis);
 }
 
 /* Set up a timer to create 1mS ticks. */