diff --git a/src/rs485_protocol.c b/src/rs485_protocol.c
index 923218b..da44bf9 100644
--- a/src/rs485_protocol.c
+++ b/src/rs485_protocol.c
@@ -111,7 +111,7 @@ void ultrasonic_distance_report(void) {
     distance_uint16 = ultrasonic_calc_distance();
 
 #ifdef DEBUG_VOFA_TOOL
-    printf("%d\n", distance_uint16)
+    printf("%d\n", distance_uint16);
 #else
     package_data[0] = (distance_uint16 >> 8) & 0xFF;
     package_data[1] = distance_uint16 & 0xFF;