diff --git a/impl/src/layer1/packet_mod.c b/impl/src/layer1/packet_mod.c
index 03b8554..a371ce3 100644
--- a/impl/src/layer1/packet_mod.c
+++ b/impl/src/layer1/packet_mod.c
@@ -81,7 +81,7 @@ result_t packet_mod_set_data(packet_mod_ctx_t *ctx, const unsigned char *data, s
 	memcpy(ctx->pkt_bytes, data, length);
 	ctx->length = length;
 
-	ctx->raw_data_crc = crc_generate_key(PAYLOAD_CRC_SCHEME, data, length);
+	ctx->raw_data_crc = crc_generate_key(PAYLOAD_CRC_SCHEME, (unsigned char *)data, length);
 	ctx->raw_data_len = length;
 
 	ctx->state = DATA_RAW;
diff --git a/impl/src/layer1/rx.c b/impl/src/layer1/rx.c
index f33b5d9..8fffc62 100644
--- a/impl/src/layer1/rx.c
+++ b/impl/src/layer1/rx.c
@@ -101,10 +101,10 @@ static bool acquire_preamble(layer1_rx_t *rx, const float complex sample, bool d
 		// BPSK symbols and therefore can be used during ramp-up and preamble.
 
 		if(freq_est_holdoff_samples == 0) { //freq_est_history_write_idx == FREQ_EST_L) {
-			float complex linearized_history[FREQ_EST_L];
-			for(size_t i = 0; i < FREQ_EST_L; i++) {
-				linearized_history[i] = freq_est_history[(i + freq_est_history_write_idx) % FREQ_EST_L];
-			}
+			//float complex linearized_history[FREQ_EST_L];
+			//for(size_t i = 0; i < FREQ_EST_L; i++) {
+			//	linearized_history[i] = freq_est_history[(i + freq_est_history_write_idx) % FREQ_EST_L];
+			//}
 
 			float freq_est = freq_est_in_rampup(freq_est_history, FREQ_EST_L, NULL);
 
@@ -148,7 +148,7 @@ static bool acquire_preamble(layer1_rx_t *rx, const float complex sample, bool d
 }
 
 
-typedef enum squelch_state_t {
+enum squelch_state_t {
 	SQUELCH_CLOSED,
 	SQUELCH_OPEN,
 	SQUELCH_JUST_OPENED,
@@ -331,7 +331,7 @@ result_t layer1_rx_process(layer1_rx_t *rx, const float complex *samples, size_t
 									header_enc, 8, sizeof(header_enc), &nsyms));
 
 						if(fec_decode(rx->hdr_fec, sizeof(header), header_enc, header) != LIQUID_OK) {
-							DEBUG_LOG("Header decoding failed!\n", rx->modcod);
+							DEBUG_LOG("Header decoding failed!\n");
 							rx->state = RX_STATE_ACQUISITION;
 							rx->callback(RX_EVT_HEADER_ERROR, NULL, 0);
 							break;
@@ -415,7 +415,7 @@ result_t layer1_rx_process(layer1_rx_t *rx, const float complex *samples, size_t
 					if(symbol_counter == rx->payload_len_symbols) {
 						unsigned int nsyms;
 						unsigned char payload_enc[rx->payload_len_enc_bytes];
-						unsigned char payload[rx->payload_len_bytes];
+						unsigned char payload[rx->payload_len_bytes+1];
 
 						ERR_CHECK_LIQUID(liquid_repack_bytes(
 									symbols_int, modem_get_bps(rx->payload_demod), rx->payload_len_symbols,
diff --git a/impl/src/layer1/tx.c b/impl/src/layer1/tx.c
index 6a7e1c1..c48df0f 100644
--- a/impl/src/layer1/tx.c
+++ b/impl/src/layer1/tx.c
@@ -164,7 +164,7 @@ result_t layer1_tx_finalize_burst(layer1_tx_t *tx)
 	// allocate a temporary buffer
 	float complex *tmp = malloc(sizeof(float complex) * tx->samples_used);
 	if(!tmp) {
-		fprintf(stderr, "Could not allocate buffer for TX frequency correction.\n", len, tx->samples_used);
+		fprintf(stderr, "Could not allocate buffer for TX frequency correction.\n");
 		return ERR_NO_MEM;
 	}
 
diff --git a/impl/src/main.c b/impl/src/main.c
index 9a24a13..ea8708a 100644
--- a/impl/src/main.c
+++ b/impl/src/main.c
@@ -2,6 +2,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <ctype.h>
+#include <string.h>
 
 #include <liquid/liquid.h>
 
diff --git a/impl/test/layer1/test_rx_file.c b/impl/test/layer1/test_rx_file.c
index b8afa96..06a5c4c 100644
--- a/impl/test/layer1/test_rx_file.c
+++ b/impl/test/layer1/test_rx_file.c
@@ -58,6 +58,9 @@ static result_t sdr_rf_to_baseband(nco_crcf nco, firdecim_crcf  decim,
 
 void cb_rx(rx_evt_t evt, uint8_t *packet_data, size_t packet_len)
 {
+	(void)packet_data;
+	(void)packet_len;
+
 	switch(evt)
 	{
 		case RX_EVT_CHECKSUM_ERROR: