Index: uspace/app/netecho/comm.c
===================================================================
--- uspace/app/netecho/comm.c	(revision 8d2dd7f2d52fbc7693f94b66e451eeff3756d061)
+++ uspace/app/netecho/comm.c	(revision 08d4ea2111e5db01d0a6194bd9da4248ee282dc7)
@@ -71,5 +71,5 @@
 	size_t pos;
 	size_t now;
-	int rc;
+	errno_t rc;
 
 	size = udp_rmsg_size(rmsg);
@@ -109,8 +109,8 @@
 }
 
-int comm_open_listen(const char *port_s)
+errno_t comm_open_listen(const char *port_s)
 {
 	inet_ep2_t epp;
-	int rc;
+	errno_t rc;
 
 	char *endptr;
@@ -142,9 +142,9 @@
 }
 
-int comm_open_talkto(const char *hostport)
+errno_t comm_open_talkto(const char *hostport)
 {
 	inet_ep2_t epp;
 	const char *errmsg;
-	int rc;
+	errno_t rc;
 
 	inet_ep2_init(&epp);
@@ -182,7 +182,7 @@
 }
 
-int comm_send(void *data, size_t size)
+errno_t comm_send(void *data, size_t size)
 {
-	int rc = udp_assoc_send_msg(assoc, &remote, data, size);
+	errno_t rc = udp_assoc_send_msg(assoc, &remote, data, size);
 	if (rc != EOK)
 		return EIO;
Index: uspace/app/netecho/comm.h
===================================================================
--- uspace/app/netecho/comm.h	(revision 8d2dd7f2d52fbc7693f94b66e451eeff3756d061)
+++ uspace/app/netecho/comm.h	(revision 08d4ea2111e5db01d0a6194bd9da4248ee282dc7)
@@ -39,8 +39,8 @@
 #include <stddef.h>
 
-extern int comm_open_listen(const char *);
-extern int comm_open_talkto(const char *);
+extern errno_t comm_open_listen(const char *);
+extern errno_t comm_open_talkto(const char *);
 extern void comm_close(void);
-extern int comm_send(void *, size_t);
+extern errno_t comm_send(void *, size_t);
 
 #endif
Index: uspace/app/netecho/netecho.c
===================================================================
--- uspace/app/netecho/netecho.c	(revision 8d2dd7f2d52fbc7693f94b66e451eeff3756d061)
+++ uspace/app/netecho/netecho.c	(revision 08d4ea2111e5db01d0a6194bd9da4248ee282dc7)
@@ -75,5 +75,5 @@
 	char cbuf[STR_BOUNDS(1)];
 	size_t offs;
-	int rc;
+	errno_t rc;
 
 	offs = 0;
@@ -137,5 +137,5 @@
 static void netecho_send_messages(char **msgs)
 {
-	int rc;
+	errno_t rc;
 
 	while (*msgs != NULL) {
@@ -154,5 +154,5 @@
 	char *port;
 	char **msgs;
-	int rc;
+	errno_t rc;
 
 	if (argc < 2) {