diff --git a/stm-firmware/main.c b/stm-firmware/main.c
index b39c1b9..9063600 100644
--- a/stm-firmware/main.c
+++ b/stm-firmware/main.c
@@ -238,9 +238,9 @@ int main()
 			}
 
 			if (error_state) {
-				led_set(1, !led_get(1));
+				led_set(0, !led_get(0));
 			} else {
-				led_set(1, 0);
+				led_set(0, 0);
 			}
 
 			pt1000_status = adc_pt1000_check_error();