diff --git a/slirp/bootp.c b/slirp/bootp.c
index 27220ee205..750fae3d05 100644
--- a/slirp/bootp.c
+++ b/slirp/bootp.c
@@ -36,7 +36,7 @@ typedef struct {
     uint8_t macaddr[6];
 } BOOTPClient;
 
-BOOTPClient bootp_clients[NB_ADDR];
+static BOOTPClient bootp_clients[NB_ADDR];
 
 const char *bootp_filename;
 
diff --git a/slirp/ip_icmp.c b/slirp/ip_icmp.c
index 2514f9f831..b3d4348bbe 100644
--- a/slirp/ip_icmp.c
+++ b/slirp/ip_icmp.c
@@ -43,7 +43,7 @@ struct icmpstat icmpstat;
 
 /* The message sent when emulating PING */
 /* Be nice and tell them it's just a pseudo-ping packet */
-const char icmp_ping_msg[] = "This is a pseudo-PING packet used by Slirp to emulate ICMP ECHO-REQUEST packets.\n";
+static const char icmp_ping_msg[] = "This is a pseudo-PING packet used by Slirp to emulate ICMP ECHO-REQUEST packets.\n";
 
 /* list of actions for icmp_error() on RX of an icmp message */
 static const int icmp_flush[19] = {