diff --git a/ethermess.c b/ethermess.c
index 04fb1eb..0c780ad 100644
--- a/ethermess.c
+++ b/ethermess.c
@@ -370,7 +370,6 @@ bool check_padding(const unsigned char *data, size_t index, size_t data_length)
 void handle_status(const unsigned char source_mac[6], const unsigned char *data, size_t data_length) {
 	if (data_length < 2) {
 		// Too short
-		fprintf(stderr, "Data too short: %zu\n", data_length); // debg
 		return;
 	}
 
@@ -378,7 +377,6 @@ void handle_status(const unsigned char source_mac[6], const unsigned char *data,
 
 	if (status != EMS_AVAILABLE && status != EMS_UNAVAILABLE && status != EMS_OFFLINE) {
 		// Unknown status, throw away
-		fprintf(stderr, "Unknown status %u\n", status); // debg
 		return;
 	}
 
@@ -386,7 +384,6 @@ void handle_status(const unsigned char source_mac[6], const unsigned char *data,
 
 	if (nick_length > data_length - 2) {
 		// Malformed length field
-		fprintf(stderr, "Nick length %u, remaining packet length %zu\n", nick_length, data_length); // debg
 		return;
 	}
 
@@ -435,7 +432,6 @@ void handle_status(const unsigned char source_mac[6], const unsigned char *data,
 void handle_msgid(const unsigned char source_mac[6], const unsigned char *data, size_t data_length) {
 	if (data_length < 2) {
 		// Too short
-		fprintf(stderr, "Data too short: %zu\n", data_length); // debg
 		return;
 	}
 
@@ -480,7 +476,6 @@ void handle_msgid(const unsigned char source_mac[6], const unsigned char *data,
 void handle_message(const unsigned char source_mac[6], const unsigned char *data, size_t data_length) {
 	if (data_length < 4) {
 		// Too short
-		fprintf(stderr, "Data too short: %zu\n", data_length); // debg
 		return;
 	}
 
@@ -490,7 +485,6 @@ void handle_message(const unsigned char source_mac[6], const unsigned char *data
 
 	if (message_length > data_length - 4 || message_length > EM_MESSAGE_MAX_LENGTH) {
 		// Malformed length field
-		fprintf(stderr, "Message length %u, remaining packet length %zu, max message length %u\n", message_length, data_length, EM_MESSAGE_MAX_LENGTH); // debg
 		return;
 	}
 
@@ -569,7 +563,6 @@ void handle_message(const unsigned char source_mac[6], const unsigned char *data
 void handle_ack(const unsigned char source_mac[6], const unsigned char *data, size_t data_length) {
 	if (data_length < 2) {
 		// Too short
-		fprintf(stderr, "Data too short: %zu\n", data_length); // debg
 		return;
 	}
 
@@ -611,10 +604,8 @@ void process_frame(void) {
 
 	if (memcmp(frame, own_mac, 6) == 0) {
 		// Targetted at us
-		fprintf(stderr, "."); // debg
 	} else if (memcmp(frame, broadcast_mac, 6) == 0) {
 		// Broadcast
-		fprintf(stderr, "^"); // debg
 	} else {
 		// Does not concern us
 		return;
@@ -629,7 +620,6 @@ void process_frame(void) {
 
 	// If they speak a version we don't understand, tell them to speak ours
 	if (version > EM_PROTOCOL_VERSION) {
-		fprintf(stderr, "Protocol version mismatch: %u\n", version); // debg
 		send_speak_version(source_mac);
 		return;
 	}
@@ -666,9 +656,6 @@ void process_frame(void) {
 		case EMT_ACK:
 			handle_ack(source_mac, &frame[16], packet_length - 16);
 			break;
-
-		default:
-			fprintf(stderr, "Ignoring packet of type %i\n", packet_type);
 	}
 }
 
@@ -869,7 +856,12 @@ int main(int argc, char **argv) {
 	// Print it out
 	char own_mac_str[18];
 	format_mac(own_mac, own_mac_str);
-	fprintf(stderr, "%s\n", own_mac_str);
+	if (printf("%s\n", own_mac_str) == -1) {
+		err(1, "printf");
+	}
+	if (fflush(stdout) == EOF) {
+		err(1, "fflush");
+	}
 
 	// Set our nick
 	if (memcmp(own_mac, veth0a_mac, 6) == 0) {