diff --git a/impl/src/main.c b/impl/src/main.c
index 4ed38f6..c6096c9 100644
--- a/impl/src/main.c
+++ b/impl/src/main.c
@@ -142,12 +142,14 @@ void cb_rx(rx_evt_t evt, const struct layer1_rx_s *rx, uint8_t *packet_data, siz
 static result_t transmit(sdr_ctx_t *sdr, const float complex *samples, size_t len)
 {
 	size_t to_transmit_rf = len * SDR_OVERSAMPLING;
-	float complex rf_samples[to_transmit_rf];
+	float complex *rf_samples = malloc(sizeof(*rf_samples) * to_transmit_rf);
 
 	RESULT_CHECK(sdr_baseband_to_rf(sdr, samples, len, rf_samples, &to_transmit_rf));
 
 	result_t result = sdr_transmit(sdr, rf_samples, to_transmit_rf, 100000);
 
+	free(rf_samples);
+
 	fprintf(stderr, "t");
 	return result;
 }