diff --git a/impl/src/config.h b/impl/src/config.h
index 756d6ab..f8f27f2 100644
--- a/impl/src/config.h
+++ b/impl/src/config.h
@@ -54,7 +54,7 @@
 
 // gain configuration
 #define SDR_GAIN_TX_AMP    0.0f   // extra power amplifier. Set to 14.0f to activate.
-#define SDR_GAIN_TX_LNA    0.0f   // normal variable gain amplifier.
+#define SDR_GAIN_TX_VGA    0.0f   // normal variable gain amplifier.
 
 #define SDR_GAIN_RX_AMP    0.0f   // extra input amplifier. Set to 14.0f to activate.
 #define SDR_GAIN_RX_LNA   30.0f   // RF variable gain amplifier.
diff --git a/impl/src/sdr/sdr.c b/impl/src/sdr/sdr.c
index ef1db6c..c818d9e 100644
--- a/impl/src/sdr/sdr.c
+++ b/impl/src/sdr/sdr.c
@@ -249,7 +249,7 @@ result_t sdr_start_tx(sdr_ctx_t *ctx, size_t burst_size)
 	result = hackrf_set_amp_enable(ctx->hackrf, SDR_GAIN_TX_AMP > 0);
 	CHECK_HACKRF_RESULT(result, "hackrf_set_amp_enable");
 
-	result = hackrf_set_txvga_gain(ctx->hackrf, SDR_GAIN_TX_AMP);
+	result = hackrf_set_txvga_gain(ctx->hackrf, SDR_GAIN_TX_VGA);
 	CHECK_HACKRF_RESULT(result, "hackrf_set_txvga_gain");
 
 	result = hackrf_start_tx(ctx->hackrf, tx_callback, ctx);