diff --git a/afsk/main.c b/afsk/main.c
index abd1b0d8..c3f142af 100644
--- a/afsk/main.c
+++ b/afsk/main.c
@@ -63,6 +63,7 @@
 #define ON 1
 
 uint32_t tx_freq_hz = 434900000 + FREQUENCY_OFFSET;
+uint8_t data[1024];
 uint32_t tx_channel = 0;
 
 ax5043_conf_t hax5043;