diff --git a/src/main.c b/src/main.c
index 501c1d0..831ece3 100644
--- a/src/main.c
+++ b/src/main.c
@@ -551,7 +551,7 @@ static void rf_tx_stop()
 
 static void rf_rx(void)
 {
-	const int amp_max = CLK_SYS_HZ / 2 / BANDWIDTH * DECIMATION + 1;
+	const int amp_max = CLK_SYS_HZ / 2 / BANDWIDTH * DECIMATION + 16;
 	const int amp_scale = INT_MAX / amp_max;
 
 	static int8_t block[IQ_BLOCK_LEN];