diff --git a/seq/aconnect/aconnect.c b/seq/aconnect/aconnect.c
index 3a10de9..7096feb 100644
--- a/seq/aconnect/aconnect.c
+++ b/seq/aconnect/aconnect.c
@@ -193,7 +193,8 @@ static void do_search_port(snd_seq_t *seq, int perm, action_func_t do_action)
 }
 
 
-static void print_port(snd_seq_t *, snd_seq_client_info_t *cinfo,
+static void print_port(snd_seq_t *seq ATTRIBUTE_UNUSED,
+		       snd_seq_client_info_t *cinfo,
 		       snd_seq_port_info_t *pinfo, int count)
 {
 	if (! count) {
@@ -247,8 +248,10 @@ static void print_port_and_subs(snd_seq_t *seq, snd_seq_client_info_t *cinfo,
 /*
  * remove all (exported) connections
  */
-static void remove_connection(snd_seq_t *seq, snd_seq_client_info_t *,
-			      snd_seq_port_info_t *pinfo, int)
+static void remove_connection(snd_seq_t *seq,
+			      snd_seq_client_info_t *info ATTRIBUTE_UNUSED,
+			      snd_seq_port_info_t *pinfo,
+			      int count ATTRIBUTE_UNUSED)
 {
 	snd_seq_query_subscribe_t *query;
 	snd_seq_port_info_t *port;
diff --git a/seq/aplaymidi/arecordmidi.c b/seq/aplaymidi/arecordmidi.c
index ce71472..a4c1181 100644
--- a/seq/aplaymidi/arecordmidi.c
+++ b/seq/aplaymidi/arecordmidi.c
@@ -719,7 +719,7 @@ static void version(void)
 	fputs("arecordmidi version " SND_UTIL_VERSION_STR "\n", stderr);
 }
 
-static void sighandler(int)
+static void sighandler(int sig ATTRIBUTE_UNUSED)
 {
 	stop = 1;
 }
diff --git a/seq/aseqdump/aseqdump.c b/seq/aseqdump/aseqdump.c
index 8455ecb..af4ca21 100644
--- a/seq/aseqdump/aseqdump.c
+++ b/seq/aseqdump/aseqdump.c
@@ -676,7 +676,7 @@ static void version(void)
 	puts("aseqdump version " SND_UTIL_VERSION_STR);
 }
 
-static void sighandler(int)
+static void sighandler(int sig ATTRIBUTE_UNUSED)
 {
 	stop = 1;
 }
diff --git a/seq/aseqnet/aseqnet.c b/seq/aseqnet/aseqnet.c
index f40de7d..aa70b50 100644
--- a/seq/aseqnet/aseqnet.c
+++ b/seq/aseqnet/aseqnet.c
@@ -334,7 +334,7 @@ static void get_net_addr(struct addrinfo *rp, char *buf, size_t buflen)
 /*
  * signal handler
  */
-static void sigterm_exit(int)
+static void sigterm_exit(int sig ATTRIBUTE_UNUSED)
 {
 	close_files();
 	exit(1);