diff --git a/servers/inet/Makefile b/servers/inet/Makefile
index 8dbe78db8..a00963285 100644
--- a/servers/inet/Makefile
+++ b/servers/inet/Makefile
@@ -15,10 +15,14 @@ SRCS=	buf.c clock.c inet.c inet_config.c \
 DPADD+=	${LIBCHARDRIVER} ${LIBSYS} ${LIBMINIXUTIL}
 LDADD+=	-lchardriver -lsys -lminixutil
 
+.if ${COMPILER_TYPE} == "gnu"
+LDADD+= -lc
+.endif
+
 MAN=
 
 BINDIR?= /usr/sbin
 
-CPPFLAGS+=  -I${.CURDIR} -D_MINIX
+CPPFLAGS+=  -I${.CURDIR} -D_MINIX -Wall -Werror
 
 .include <minix.service.mk>
diff --git a/servers/inet/generic/buf.h b/servers/inet/generic/buf.h
index 95c893510..8f508aad6 100644
--- a/servers/inet/generic/buf.h
+++ b/servers/inet/generic/buf.h
@@ -227,9 +227,8 @@ int bf_linkcheck ARGS(( acc_t *acc ));
  * the underlying buffer.
  */
 
-#define ptr2acc_data(/* acc_t * */ a) (bf_temporary_acc=(a), \
-	(&bf_temporary_acc->acc_buffer->buf_data_p[bf_temporary_acc-> \
-		acc_offset]))
+#define ptr2acc_data(/* acc_t * */ a) (&((acc_t *)(a))->acc_buffer-> \
+				buf_data_p[((acc_t *)(a))->acc_offset])
 
 #define bf_chkbuf(buf) ((buf)? (compare((buf)->acc_linkC,>,0), \
 	compare((buf)->acc_buffer, !=, 0), \
diff --git a/servers/inet/generic/tcp_recv.c b/servers/inet/generic/tcp_recv.c
index b48a7de0b..5264f7196 100644
--- a/servers/inet/generic/tcp_recv.c
+++ b/servers/inet/generic/tcp_recv.c
@@ -213,7 +213,7 @@ SYN-SENT:
 		if (tcp_hdr_flags & THF_ACK)
 		{
 			if (tcp_LEmod4G(seg_ack, tcp_conn->tc_ISS) ||
-				tcp_Gmod4G(seg_ack, tcp_conn->tc_SND_NXT))
+				tcp_Gmod4G(seg_ack, tcp_conn->tc_SND_NXT)) {
 				if (tcp_hdr_flags & THF_RST)
 					break;
 				else
@@ -227,6 +227,7 @@ SYN-SENT:
 					tcp_conn_write(tcp_conn, 1);
 					break;
 				}
+			}
 			acceptable_ACK= (tcp_LEmod4G(tcp_conn->tc_SND_UNA,
 				seg_ack) && tcp_LEmod4G(seg_ack,
 				tcp_conn->tc_SND_NXT));
diff --git a/servers/inet/generic/udp.c b/servers/inet/generic/udp.c
index 99e8f99b5..f173f4ed2 100644
--- a/servers/inet/generic/udp.c
+++ b/servers/inet/generic/udp.c
@@ -874,11 +874,12 @@ udp_fd_t *udp_fd;
 	result= (*udp_fd->uf_put_userdata)(udp_fd->uf_srfd,
 		(size_t)0, pack, FALSE);
 
-	if (result >= 0)
+	if (result >= 0) {
 		if (size > transf_size)
 			result= EPACKSIZE;
 		else
 			result= transf_size;
+	}
 
 	udp_fd->uf_flags &= ~UFF_READ_IP;
 	result= (*udp_fd->uf_put_userdata)(udp_fd->uf_srfd, result,
diff --git a/servers/inet/inet_config.c b/servers/inet/inet_config.c
index 2a04540da..c5ebd5d9b 100644
--- a/servers/inet/inet_config.c
+++ b/servers/inet/inet_config.c
@@ -247,7 +247,7 @@ static unsigned number(char *str, unsigned max)
 
 void read_conf(void)
 {
-	int i, j, ifno, type, port, enable;
+	int i, j, ifno = -1, type = -1, port = -1, enable;
 	struct eth_conf *ecp;
 	struct psip_conf *pcp;
 	struct ip_conf *icp;
@@ -304,8 +304,7 @@ void read_conf(void)
 			}
 			ecp++;
 			eth_conf_nr++;
-		} else
-		if (strncmp(word, "psip", 4) == 0) {
+		} else if (strncmp(word, "psip", 4) == 0) {
 			pcp->pc_ifno= ifno= number(word+4, IP_PORT_MAX-1);
 			type= NETTYPE_PSIP;
 			port= psip_conf_nr;
@@ -315,6 +314,12 @@ void read_conf(void)
 			printf("inet: Unknown device '%s'\n", word);
 			error();
 		}
+
+		if (type == -1 || ifno == -1 || port == -1) {
+			printf("inet: faulty configuration\n");
+			exit(1);
+		}
+
 		iftype[ifno]= type;
 		icp->ic_ifno= ifno;
 		icp->ic_devtype= type;
diff --git a/servers/inet/sr.c b/servers/inet/sr.c
index 7f1962983..796520399 100644
--- a/servers/inet/sr.c
+++ b/servers/inet/sr.c
@@ -118,7 +118,7 @@ PUBLIC void sr_rec(m)
 mq_t *m;
 {
 	int result;
-	int send_reply, free_mess;
+	int send_reply = 0, free_mess = 0;
 
 	if (repl_queue)
 	{