diff --git a/impl/src/layer1/rx.c b/impl/src/layer1/rx.c
index d0fae51..1a4e30a 100644
--- a/impl/src/layer1/rx.c
+++ b/impl/src/layer1/rx.c
@@ -184,7 +184,7 @@ static enum squelch_state_t update_and_check_squelch(layer1_rx_t *rx, unsigned i
 	float level = agc_crcf_get_rssi(rx->agc);
 	enum squelch_state_t result = SQUELCH_CLOSED;
 
-	if((sample_idx & 0xFF) == 0) { // every 256 samples
+	if((sample_idx & 0x3F) == 0) { // every 64 samples
 		if(level < rx->noise_floor_level) {
 			rx->noise_floor_level = level;
 		} else {
@@ -197,7 +197,7 @@ static enum squelch_state_t update_and_check_squelch(layer1_rx_t *rx, unsigned i
 
 	switch(agc_crcf_squelch_get_status(rx->agc)) {
 		case LIQUID_AGC_SQUELCH_RISE:
-			DEBUG_LOG("Squelch disabled at #%u RSSI = %.3f dB [thr: %.3f dB]\n", sample_idx, level, agc_crcf_squelch_get_threshold(rx->agc));
+			DEBUG_LOG("Squelch disabled at #%zu RSSI = %.3f dB [thr: %.3f dB]\n", rx->sample_index, level, agc_crcf_squelch_get_threshold(rx->agc));
 			result = SQUELCH_JUST_OPENED;
 			break;
 
@@ -206,7 +206,7 @@ static enum squelch_state_t update_and_check_squelch(layer1_rx_t *rx, unsigned i
 			break;
 
 		case LIQUID_AGC_SQUELCH_FALL:
-			DEBUG_LOG("Squelch enabled at #%u RSSI = %.3f dB [thr: %.3f dB]\n", sample_idx, level, agc_crcf_squelch_get_threshold(rx->agc));
+			DEBUG_LOG("Squelch enabled at #%zu RSSI = %.3f dB [thr: %.3f dB]\n", rx->sample_index, level, agc_crcf_squelch_get_threshold(rx->agc));
 			// fall through
 		case LIQUID_AGC_SQUELCH_SIGNALLO:
 		case LIQUID_AGC_SQUELCH_ENABLED: