diff --git a/main.h b/main.h
index bb7bd4ff..4735427c 100644
--- a/main.h
+++ b/main.h
@@ -54,6 +54,7 @@
 
 #define OFF - 1
 #define ON 1
+#define CHECK 0
 
 uint32_t tx_freq_hz = 434900000 + FREQUENCY_OFFSET;
 uint8_t data[1024];