diff --git a/application.c b/application.c
index 0862e24..5e45835 100644
--- a/application.c
+++ b/application.c
@@ -360,7 +360,7 @@ static void clock_hours(void)
 	for (uint16_t i=0; i<512; i++) { // fade hour marks in and out
 		uint8_t brightness = (i>255 ? 512-i-1 : i); // get fade brightness
 		for (uint8_t hour=0; hour<12; hour++) { // set all hour colors
-			uint16_t led = LED_WS2812B_LEDS*hour/12; // get LED four hour mark
+			uint16_t led = (uint16_t)(LED_WS2812B_LEDS*hour)/12; // get LED four hour mark
 			clock_leds[led*3+0] = brightness; // set brightness
 			clock_leds[led*3+1] = brightness; // set brightness
 			clock_leds[led*3+2] = brightness; // set brightness