diff --git a/src/Cedar/Client.c b/src/Cedar/Client.c
index 1c8812b8..b07d5250 100644
--- a/src/Cedar/Client.c
+++ b/src/Cedar/Client.c
@@ -5161,7 +5161,7 @@ void CiRpcAccepted(CLIENT *c, SOCK *s)
 
 			err = Endian32(err);
 			SendAll(s, &err, sizeof(UINT), false);
-			RecvAll(s, &err, sizeof(UINT), false);
+			(void)RecvAll(s, &err, sizeof(UINT), false);
 		}
 		return;
 	}
diff --git a/src/Mayaqua/Network.c b/src/Mayaqua/Network.c
index e24ea410..86e10b23 100644
--- a/src/Mayaqua/Network.c
+++ b/src/Mayaqua/Network.c
@@ -11292,9 +11292,9 @@ SOCK *NewUDP4(UINT port, IP *ip)
 			if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) != 0)
 			{
 				bool false_flag = false;
-				setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *)&false_flag, sizeof(bool));
+				(void)setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *)&false_flag, sizeof(bool));
 #ifdef	SO_EXCLUSIVEADDRUSE
-				setsockopt(s, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (char *)&true_flag, sizeof(bool));
+				(void)setsockopt(s, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (char *)&true_flag, sizeof(bool));
 #endif	// SO_EXCLUSIVEADDRUSE
 				if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) != 0)
 				{
@@ -11389,9 +11389,9 @@ SOCK *NewUDP6(UINT port, IP *ip)
 			if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) != 0)
 			{
 				bool false_flag = false;
-				setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *)&false_flag, sizeof(bool));
+				(void)setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *)&false_flag, sizeof(bool));
 #ifdef	SO_EXCLUSIVEADDRUSE
-				setsockopt(s, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (char *)&true_flag, sizeof(bool));
+				(void)setsockopt(s, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (char *)&true_flag, sizeof(bool));
 #endif	// SO_EXCLUSIVEADDRUSE
 				if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) != 0)
 				{
@@ -12995,7 +12995,7 @@ SOCK *ListenEx62(UINT port, bool local_only, bool enable_ca)
 
 #ifdef	OS_UNIX
 	// It is necessary to set the IPv6 Only flag on a UNIX system
-	setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &true_flag, sizeof(true_flag));
+	(void)setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &true_flag, sizeof(true_flag));
 #endif	// OS_UNIX
 
 #ifdef	OS_UNIX
@@ -14472,9 +14472,9 @@ SOCK *ConnectEx4(char *hostname, UINT port, UINT timeout, bool *cancel_flag, cha
 	Zero(&ling, sizeof(ling));
 	// Forced disconnection flag
 #ifdef	SO_DONTLINGER
-	setsockopt(sock->socket, SOL_SOCKET, SO_DONTLINGER, (char *)&true_flag, sizeof(bool));
+	(void)setsockopt(sock->socket, SOL_SOCKET, SO_DONTLINGER, (char *)&true_flag, sizeof(bool));
 #else	// SO_DONTLINGER
-	setsockopt(sock->socket, SOL_SOCKET, SO_LINGER, (char *)&false_flag, sizeof(bool));
+	(void)setsockopt(sock->socket, SOL_SOCKET, SO_LINGER, (char *)&false_flag, sizeof(bool));
 #endif	// SO_DONTLINGER
 //	setsockopt(sock->socket, SOL_SOCKET, SO_REUSEADDR, (char *)&true_flag, sizeof(bool));
 
diff --git a/src/Mayaqua/Unix.c b/src/Mayaqua/Unix.c
index b91b1573..1b9949ac 100755
--- a/src/Mayaqua/Unix.c
+++ b/src/Mayaqua/Unix.c
@@ -536,7 +536,7 @@ void UnixSolarisSleep(UINT msec)
 	p.fd = solaris_sleep_p1;
 	p.events = POLLIN;
 
-	poll(&p, 1, msec == INFINITE ? -1 : (int)msec);
+	(void)poll(&p, 1, msec == INFINITE ? -1 : (int)msec);
 }
 
 // Get the free space of the disk
@@ -855,7 +855,7 @@ void UnixFreeSingleInstance(void *data)
 	(void)fcntl(o->fd, F_SETLK, &lock);
 	close(o->fd);
 
-	remove(o->FileName);
+	(void)remove(o->FileName);
 
 	Free(data);
 }
@@ -1261,7 +1261,7 @@ void UnixCloseIO()
 		close(0);
 		close(1);
 		close(2);
-		open("/dev/null", O_RDWR);
+		(void)open("/dev/null", O_RDWR);
 		dup2(0, 1);
 		dup2(0, 2);
 		close_io_first = false;