diff --git a/amidi/amidi.c b/amidi/amidi.c
index cde4697..90e7750 100644
--- a/amidi/amidi.c
+++ b/amidi/amidi.c
@@ -688,8 +688,11 @@ int main(int argc, char *argv[])
 				continue;
 			read += length;
 
-			if (receive_file != -1)
-				write(receive_file, buf, length);
+			if (receive_file != -1) {
+				ssize_t wlength = write(receive_file, buf, length);
+				if (wlength != length)
+					error("write error: %s", wlength < 0 ? strerror(errno) : "short");
+			}
 			if (dump) {
 				for (i = 0; i < length; ++i)
 					print_byte(buf[i]);
diff --git a/seq/aseqnet/aseqnet.c b/seq/aseqnet/aseqnet.c
index 70a1cfd..ebdea0b 100644
--- a/seq/aseqnet/aseqnet.c
+++ b/seq/aseqnet/aseqnet.c
@@ -491,8 +491,11 @@ static void flush_writebuf(void)
 	if (cur_wrlen) {
 		int i;
 		for (i = 0; i < max_connection; i++) {
-			if (netfd[i] >= 0)
-				write(netfd[i], writebuf, cur_wrlen);
+			if (netfd[i] >= 0) {
+				ssize_t wrlen = write(netfd[i], writebuf, cur_wrlen);
+				if (wrlen != (ssize_t)cur_wrlen)
+					fprintf(stderr, "write error: %s", wrlen < 0 ? strerror(errno) : "short");
+			}
 		}
 		cur_wrlen = 0;
 	}